{"id":19004,"date":"2026-07-13T15:30:13","date_gmt":"2026-07-13T15:30:13","guid":{"rendered":"https:\/\/tuohaihardware.com\/?p=19004"},"modified":"2026-09-26T08:20:30","modified_gmt":"2026-09-26T08:20:30","slug":"klicove-rozdily-mezi-pozinkovanou-a-nerezovou-oceli-a-jak-si-vybrat","status":"publish","type":"post","link":"https:\/\/tuohaihardware.com\/cs\/zinc-plated-vs-stainless-steel-key-differences-and-how-to-choose\/","title":{"rendered":"Pozinkovan\u00e1 vs. nerezov\u00e1 ocel: Kl\u00ed\u010dov\u00e9 rozd\u00edly a jak si vybrat"},"content":{"rendered":"

\"Pozinkovan\u00e1<\/p>\n

P\u0159i n\u00e1kupu \u017eelez\u00e1\u0159sk\u00fdch v\u00fdrobk\u016f jsou pozinkovan\u00e1 ocel a nerezov\u00e1 ocel dv\u011bma nejb\u011b\u017en\u011bj\u0161\u00edmi volbami. Jsou \u0161iroce pou\u017e\u00edv\u00e1ny pro \u0159et\u011bzy, spojovac\u00ed prvky, ocelov\u00e1 lana a mnoho dal\u0161\u00edch pr\u016fmyslov\u00fdch \u017eelez\u00e1\u0159sk\u00fdch v\u00fdrobk\u016f. P\u0159esto\u017ee oba materi\u00e1ly poskytuj\u00ed dobrou ochranu proti korozi, li\u0161\u00ed se v\u00fdrazn\u011b v odolnosti proti korozi, \u017eivotnosti, n\u00e1kladech na \u00fadr\u017ebu, cen\u011b a vhodn\u00e9m pou\u017eit\u00ed. Tento \u010dl\u00e1nek poskytuje podrobn\u00e9 srovn\u00e1n\u00ed pozinkovan\u00e9 oceli a nerezov\u00e9 oceli spolu s praktick\u00fdmi p\u0159\u00edklady z \u0159et\u011bzov\u00e9ho pr\u016fmyslu, abyste si mohli vybrat nejvhodn\u011bj\u0161\u00ed variantu na z\u00e1klad\u011b va\u0161eho provozn\u00edho prost\u0159ed\u00ed a rozpo\u010dtu.<\/p>\n

Pozinkovan\u00e1 vs. nerezov\u00e1 ocel: Kl\u00ed\u010dov\u00e9 rozd\u00edly<\/strong><\/h2>\n

1.\u00a0Mechanismus ochrany proti korozi<\/strong><\/h3>\n

\"Mechanismus<\/p>\n

P\u0159esto\u017ee se pozinkovan\u00e1 ocel i nerezov\u00e1 ocel pou\u017e\u00edvaj\u00ed k prevenci rzi a koroze, chr\u00e1n\u00ed kov zcela odli\u0161n\u00fdmi zp\u016fsoby.<\/p>\n

Zinkov\u00e1n\u00ed vytv\u00e1\u0159\u00ed na povrchu uhl\u00edkov\u00e9 oceli vrstvu zinku. Tato vrstva pom\u00e1h\u00e1 zpomalovat korozi t\u00edm, \u017ee br\u00e1n\u00ed p\u0159\u00edstupu vzduchu a vlhkosti k z\u00e1kladn\u00edmu kovu. P\u0159i vystaven\u00ed korozivn\u00edmu prost\u0159ed\u00ed zinkov\u00fd povlak tak\u00e9 nejprve oxiduje a poskytuje ochranu oceli pod n\u00edm, co\u017e pom\u00e1h\u00e1 prodlou\u017eit \u017eivotnost v\u00fdrobku. Odolnost pozinkovan\u00fdch v\u00fdrobk\u016f proti korozi proto z\u00e1vis\u00ed p\u0159edev\u0161\u00edm na tlou\u0161\u0165ce povlaku, jeho stavu a skute\u010dn\u00e9m provozn\u00edm prost\u0159ed\u00ed.<\/p>\n

Odolnost nerezov\u00e9 oceli proti korozi vych\u00e1z\u00ed ze samotn\u00e9ho materi\u00e1lu a nez\u00e1vis\u00ed na \u017e\u00e1dn\u00e9 povrchov\u00e9 \u00faprav\u011b. Chrom v nerezov\u00e9 oceli vytv\u00e1\u0159\u00ed na povrchu hust\u00fd pasivn\u00ed film, kter\u00fd pom\u00e1h\u00e1 zabr\u00e1nit kontaktu z\u00e1kladn\u00edho kovu s kysl\u00edkem, vlhkost\u00ed a dal\u0161\u00edmi korozivn\u00edmi l\u00e1tkami. To d\u00e1le zlep\u0161uje jej\u00ed odolnost proti korozi. I po drobn\u00fdch n\u00e1razech nebo po\u0161kozen\u00ed povrchu si nerezov\u00e1 ocel udr\u017e\u00ed stabiln\u00ed odolnost proti korozi, tak\u017ee jej\u00ed ochrana je obecn\u011b konzistentn\u011bj\u0161\u00ed a d\u00e9letrvaj\u00edc\u00ed.<\/p>\n

Nap\u0159\u00edklad v \u0159et\u011bzov\u00e9m pr\u016fmyslu je odolnost korozi pozinkovan\u00fd \u0159et\u011bz<\/a> poch\u00e1z\u00ed ze zinkov\u00e9ho povlaku na jeho povrchu. Po dlouhodob\u00e9m pou\u017e\u00edv\u00e1n\u00ed se povlak m\u016f\u017ee postupn\u011b opot\u0159ebovat, co\u017e vede k tomu, \u017ee uhl\u00edkov\u00e1 ocel pod n\u00edm za\u010dne reziv\u011bt. A nerezov\u00fd \u0159et\u011bz<\/a>, Nicm\u00e9n\u011b, jeho odolnost proti korozi je d\u00e1na samotn\u00fdm materi\u00e1lem. I kdy\u017e se na povrchu objev\u00ed drobn\u00e9 \u0161kr\u00e1bance, neztrat\u00ed ochranu stejn\u011b jako pozinkovan\u00fd \u0159et\u011bz.<\/p>\n

2. Odolnost proti korozi<\/h3>\n

\"Odolnost<\/p>\n

Odolnost proti korozi je obvykle jednou z hlavn\u00edch obav kupuj\u00edc\u00edch a je tak\u00e9 jedn\u00edm z nejz\u0159eteln\u011bj\u0161\u00edch rozd\u00edl\u016f mezi pozinkovanou ocel\u00ed a nerezovou ocel\u00ed.<\/p>\n

V b\u011b\u017en\u00e9m vnit\u0159n\u00edm a such\u00e9m prost\u0159ed\u00ed m\u016f\u017ee zinkov\u00e1n\u00ed poskytnout dobrou ochranu proti korozi a splnit v\u011bt\u0161inu po\u017eadavk\u016f ka\u017edodenn\u00edho pou\u017e\u00edv\u00e1n\u00ed. Pokud je v\u0161ak povlak vystaven dlouhodob\u00e9mu t\u0159en\u00ed, n\u00e1raz\u016fm, de\u0161ti nebo vlhk\u00fdm podm\u00ednk\u00e1m, postupn\u011b se opot\u0159ebov\u00e1v\u00e1 a koroduje. Jakmile je ochrann\u00e1 vrstva po\u0161kozena, m\u016f\u017ee uhl\u00edkov\u00e1 ocel pod n\u00ed za\u010d\u00edt reziv\u011bt.<\/p>\n

Pro srovn\u00e1n\u00ed, nerezov\u00e1 ocel m\u00e1 silnou odolnost proti korozi uvnit\u0159 samotn\u00e9ho materi\u00e1lu, tak\u017ee neztr\u00e1c\u00ed svou ochranu proti korozi jen proto, \u017ee je povrch opot\u0159ebovan\u00fd. V dlouhodob\u00e9m vlhk\u00e9m, de\u0161tiv\u00e9m, p\u0159\u00edmo\u0159sk\u00e9m, vysoce solen\u00e9m, potravin\u00e1\u0159sk\u00e9m nebo farmaceutick\u00e9m prost\u0159ed\u00ed je nerezov\u00e1 ocel stabiln\u011bj\u0161\u00ed a obvykle poskytuje del\u0161\u00ed \u017eivotnost.<\/p>\n

Nap\u0159\u00edklad v \u0159et\u011bzov\u00e9m pr\u016fmyslu se pozinkovan\u00e9 \u0159et\u011bzy b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed pro lehk\u00e9 aplikace, jako je b\u011b\u017en\u00e9 skladov\u00e1n\u00ed, vnit\u0159n\u00ed dekorace a z\u00e1v\u011bsn\u00e9 syst\u00e9my. Pro lodn\u00ed in\u017een\u00fdrstv\u00ed, lod\u011b, zpracov\u00e1n\u00ed potravin a l\u00e9\u010div, venkovn\u00ed pou\u017eit\u00ed nebo jin\u00e1 korozivn\u00ed prost\u0159ed\u00ed se pou\u017e\u00edvaj\u00ed \u0159et\u011bzy z oceli 304 nebo... \u0158et\u011bzy z nerezov\u00e9 oceli 316<\/a> jsou vyb\u00edr\u00e1ny \u010dast\u011bji.<\/p>\n

3. Pevnost a trvanlivost<\/h3>\n

\"Pevnost<\/p>\n

Mnoho lid\u00ed se domn\u00edv\u00e1, \u017ee nerezov\u00e1 ocel je v\u017edy pevn\u011bj\u0161\u00ed ne\u017e pozinkovan\u00e1 ocel, ale to nen\u00ed \u00fapln\u011b pravda.<\/p>\n

Zinkov\u00e1n\u00ed je pouze povrchov\u00e1 \u00faprava a neur\u010duje mechanick\u00e9 vlastnosti v\u00fdrobku. Pevnost z\u00e1vis\u00ed p\u0159edev\u0161\u00edm na z\u00e1kladn\u00edm materi\u00e1lu, procesu tepeln\u00e9ho zpracov\u00e1n\u00ed a v\u00fdrobn\u00edm standardu.<\/p>\n

Nap\u0159\u00edklad pokud jsou dva \u0159et\u011bzy stejn\u00e9 velikosti vyrobeny z vysokopevnostn\u00ed legovan\u00e9 oceli a nerezov\u00e9 oceli 304, \u0159et\u011bz z legovan\u00e9 oceli<\/a> obvykle m\u00e1 vy\u0161\u0161\u00ed pevnost ne\u017e \u0159et\u011bz z nerezov\u00e9 oceli 304. Pevnost by proto m\u011bla b\u00fdt porovn\u00e1na na z\u00e1klad\u011b skute\u010dn\u00e9 velikosti, standardu a jakosti materi\u00e1lu.<\/p>\n

Rozd\u00edl v trvanlivosti se v\u0161ak st\u00e1v\u00e1 znateln\u011bj\u0161\u00edm p\u0159i dlouhodob\u00e9m pou\u017e\u00edv\u00e1n\u00ed. Pevnost pozinkovan\u00e9ho v\u00fdrobku z\u00e1vis\u00ed na uhl\u00edkov\u00e9 oceli pod n\u00edm. Jakmile se zinkov\u00fd povlak opot\u0159ebuje a za\u010dne koroze, m\u016f\u017ee se pevnost v\u00fdrobku postupn\u011b sni\u017eovat, proto\u017ee koroze se st\u00e1v\u00e1 siln\u011bj\u0161\u00ed. Nerezov\u00e1 ocel m\u00e1 stabiln\u011bj\u0161\u00ed odolnost proti korozi, tak\u017ee si m\u016f\u017ee d\u00e9le zachovat sv\u00e9 p\u016fvodn\u00ed mechanick\u00e9 vlastnosti ve vlhk\u00e9m, mo\u0159sk\u00e9m nebo korozivn\u00edm prost\u0159ed\u00ed. V d\u016fsledku toho je jej\u00ed celkov\u00e1 \u017eivotnost a trvanlivost obvykle lep\u0161\u00ed.<\/p>\n

V \u0159et\u011bzov\u00e9m pr\u016fmyslu mohou pozinkovan\u00e9 \u0159et\u011bzy pln\u011b spl\u0148ovat pevnostn\u00ed po\u017eadavky v\u011bt\u0161iny vnit\u0159n\u00edch a b\u011b\u017en\u00fdch pr\u016fmyslov\u00fdch aplikac\u00ed. U \u0159et\u011bz\u016f, kter\u00e9 jsou v\u0161ak dlouhodob\u011b vystaveny pob\u0159e\u017en\u00edm oblastem, lod\u00edm nebo prost\u0159ed\u00edm v potravin\u00e1\u0159sk\u00e9m pr\u016fmyslu, v\u0161ak \u0159et\u011bzy z nerezov\u00e9 oceli obvykle poskytuj\u00ed del\u0161\u00ed \u017eivotnost p\u0159i zachov\u00e1n\u00ed sv\u00e9 pevnosti.<\/p>\n

4. Vzhled<\/h3>\n

\"Vzhled<\/p>\n

Oba materi\u00e1ly vypadaj\u00ed podobn\u011b, proto\u017ee oba maj\u00ed st\u0159\u00edbrn\u00fd kovov\u00fd povrch, tak\u017ee je m\u016f\u017ee b\u00fdt obt\u00ed\u017en\u00e9 rozli\u0161it, pokud s nimi nejste obezn\u00e1meni.<\/p>\n

Pozinkovan\u00e9 v\u00fdrobky maj\u00ed obvykle jasn\u011bj\u0161\u00ed a rovnom\u011brn\u011bj\u0161\u00ed povrch s dobr\u00fdm dekorativn\u00edm vzhledem. Proto se \u010dasto pou\u017e\u00edvaj\u00ed v n\u00e1bytku, dekorac\u00edch, v\u00fdstavn\u00edch syst\u00e9mech a podobn\u00fdch aplikac\u00edch.<\/p>\n

Nerezov\u00e1 ocel m\u00e1 p\u0159irozen\u011bj\u0161\u00ed kovov\u00fd vzhled. R\u016fzn\u00e9 druhy nerezov\u00e9 oceli a povrchov\u00e9 \u00fapravy mohou tak\u00e9 vytv\u00e1\u0159et r\u016fzn\u00e9 efekty, jako je le\u0161t\u011bn\u00fd, kart\u00e1\u010dovan\u00fd nebo zrcadlov\u00fd lesk. A\u010dkoli b\u011b\u017en\u00e1 nerezov\u00e1 ocel nemus\u00ed vypadat tak jasn\u011b jako pozinkovan\u00e1 ocel, obvykle m\u00e1 luxusn\u011bj\u0161\u00ed vzhled a dok\u00e1\u017ee si udr\u017eet stabiln\u00ed povrch po dlouhou dobu bez \u010dast\u00e9 \u00fadr\u017eby.<\/p>\n

5. \u017divotnost a \u00fadr\u017eba<\/h3>\n

\"\u017divotnost<\/p>\n

Pozinkovan\u00e9 v\u00fdrobky mohou za norm\u00e1ln\u00edch podm\u00ednek vydr\u017eet mnoho let. Ve vlhk\u00e9m prost\u0159ed\u00ed nebo prost\u0159ed\u00ed s vysok\u00fdm obsahem soli v\u0161ak zinkov\u00fd povlak tak\u00e9 koroduje. Povlak by m\u011bl b\u00fdt pravideln\u011b kontrolov\u00e1n, zda nen\u00ed po\u0161kozen, a v z\u00e1vislosti na jeho stavu m\u016f\u017ee b\u00fdt nutn\u00e1 \u00fadr\u017eba nebo v\u00fdm\u011bna.<\/p>\n

Nerezov\u00e1 ocel m\u00e1 lep\u0161\u00ed odolnost proti korozi a dok\u00e1\u017ee si udr\u017eet stabiln\u00ed v\u00fdkon bez \u010dast\u00e9 \u00fadr\u017eby. R\u016fzn\u00e9 jakosti, jako nap\u0159\u00edklad 304, 316 a 2205, lze vyb\u00edrat podle skute\u010dn\u00e9ho korozivn\u00edho prost\u0159ed\u00ed, aby se zajistila vhodn\u011bj\u0161\u00ed odolnost proti korozi. Proto u za\u0159\u00edzen\u00ed, kter\u00e1 mus\u00ed pracovat nep\u0159etr\u017eit\u011b po dlouhou dobu, m\u016f\u017ee m\u00edt nerezov\u00e1 ocel vy\u0161\u0161\u00ed po\u010d\u00e1te\u010dn\u00ed po\u0159izovac\u00ed n\u00e1klady, ale jej\u00ed celkov\u00e9 dlouhodob\u00e9 n\u00e1klady mohou b\u00fdt ni\u017e\u0161\u00ed.<\/p>\n

Nap\u0159\u00edklad n\u011bkte\u0159\u00ed na\u0161i z\u00e1kazn\u00edci pou\u017e\u00edvaj\u00ed \u0159et\u011bzy v m\u00edstech, kde je \u010dast\u00e1 v\u00fdm\u011bna nebo \u00fadr\u017eba obt\u00ed\u017en\u00e1. V t\u011bchto p\u0159\u00edpadech vol\u00ed \u0159et\u011bzy z nerezov\u00e9 oceli, aby v\u00fdrazn\u011b sn\u00ed\u017eili po\u010det budouc\u00edch v\u00fdm\u011bn a \u00fadr\u017eby.<\/p>\n

\u00a06. N\u00e1klady<\/h3>\n

Cena je p\u0159i n\u00e1kupu v\u017edy jedn\u00edm z hlavn\u00edch faktor\u016f.<\/p>\n

Zinkov\u00e1n\u00ed p\u0159id\u00e1v\u00e1 k uhl\u00edkov\u00e9 oceli proces galvanick\u00e9ho pokovov\u00e1n\u00ed, tak\u017ee jeho v\u00fdrobn\u00ed n\u00e1klady jsou relativn\u011b n\u00edzk\u00e9. Je to tak\u00e9 jedna z nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edch a n\u00e1kladov\u011b nejefektivn\u011bj\u0161\u00edch metod ochrany proti korozi.<\/p>\n

Nerezov\u00e1 ocel m\u00e1 vy\u0161\u0161\u00ed materi\u00e1lov\u00e9 n\u00e1klady a je obt\u00ed\u017en\u011bj\u0161\u00ed na zpracov\u00e1n\u00ed ne\u017e uhl\u00edkov\u00e1 ocel. V d\u016fsledku toho jsou v\u00fdrobky z nerezov\u00e9 oceli obvykle dra\u017e\u0161\u00ed ne\u017e podobn\u00e9 pozinkovan\u00e9 v\u00fdrobky z uhl\u00edkov\u00e9 oceli. To plat\u00ed zejm\u00e9na pro duplexn\u00ed nerezovou ocel 316 a 2205, kter\u00e9 obvykle stoj\u00ed mnohem v\u00edce ne\u017e pozinkovan\u00e9 v\u00fdrobky z uhl\u00edkov\u00e9 oceli stejn\u00e9 specifikace.<\/p>\n

Samotn\u00e1 kupn\u00ed cena v\u0161ak neukazuje skute\u010dnou cenu produktu.<\/p>\n

Pokud se pozinkovan\u00e9 v\u00fdrobky pou\u017e\u00edvaj\u00ed po dlouhou dobu ve vysoce korozivn\u00edm prost\u0159ed\u00ed, m\u016f\u017ee b\u00fdt nutn\u00e9 je \u010dasto vym\u011b\u0148ovat. N\u00e1klady na \u00fadr\u017ebu, n\u00e1klady na pr\u00e1ci a ztr\u00e1ty zp\u016fsoben\u00e9 prostoji mohou b\u00fdt mnohem vy\u0161\u0161\u00ed ne\u017e n\u00e1klady na v\u00fdrobky z nerezov\u00e9 oceli.<\/p>\n

Pro kupuj\u00edc\u00ed je proto d\u016fle\u017eit\u011bj\u0161\u00ed zv\u00e1\u017eit celkov\u00e9 n\u00e1klady \u017eivotn\u00edho cyklu, ne\u017e pouze po\u010d\u00e1te\u010dn\u00ed kupn\u00ed cenu.<\/p>\n

Porovn\u00e1n\u00ed pozinkovan\u00e9 a nerezov\u00e9 oceli<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n
Funkce<\/b><\/strong><\/td>\nPozinkov\u00e1no<\/b><\/strong><\/td>\nNerez<\/b><\/strong><\/td>\n<\/tr>\n
Odolnost proti korozi<\/td>\nDobr\u00fd<\/td>\nVynikaj\u00edc\u00ed<\/td>\n<\/tr>\n
Metoda ochrany<\/td>\nZinkov\u00fd povlak<\/td>\nSamotn\u00fd materi\u00e1l<\/td>\n<\/tr>\n
Pevnost<\/td>\nZ\u00e1le\u017e\u00ed na z\u00e1kladn\u00edm materi\u00e1lu<\/td>\nZ\u00e1le\u017e\u00ed na stupni<\/td>\n<\/tr>\n
Vzhled<\/td>\nJasn\u00fd<\/td>\nP\u0159\u00edrodn\u00ed metal\u00edza<\/td>\n<\/tr>\n
\u00dadr\u017eba<\/td>\nPravideln\u00e1 kontrola<\/td>\nMinim\u00e1ln\u00ed<\/td>\n<\/tr>\n
N\u00e1klady<\/td>\nSpodn\u00ed<\/td>\nVy\u0161\u0161\u00ed<\/td>\n<\/tr>\n
Nejlep\u0161\u00ed pro<\/td>\nVnit\u0159n\u00ed a v\u0161eobecn\u00e9 pou\u017eit\u00ed<\/td>\nVenkovn\u00ed a n\u00e1mo\u0159n\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Jak si vybrat mezi pozinkovanou a nerezovou ocel\u00ed<\/strong><\/h2>\n

\"Jak<\/p>\n

P\u0159i v\u00fdb\u011bru mezi pozinkovanou ocel\u00ed a nerezovou ocel\u00ed z\u00e1vis\u00ed spr\u00e1vn\u00e1 volba p\u0159edev\u0161\u00edm na provozn\u00edm prost\u0159ed\u00ed, rozpo\u010dtu projektu a o\u010dek\u00e1van\u00e9 \u017eivotnosti.<\/p>\n

Pokud bude v\u00fdrobek pou\u017e\u00edv\u00e1n p\u0159ev\u00e1\u017en\u011b v interi\u00e9ru, v such\u00e9m prost\u0159ed\u00ed nebo pro v\u0161eobecn\u00e9 pr\u016fmyslov\u00e9 aplikace, pozinkovan\u00e1 ocel obvykle spl\u0148uje v\u011bt\u0161inu po\u017eadavk\u016f. Poskytuje dobrou ochranu proti korozi za ni\u017e\u0161\u00ed cenu a je jedn\u00edm z nejpou\u017e\u00edvan\u011bj\u0161\u00edch \u0159e\u0161en\u00ed ochrany proti korozi pro kov\u00e1n\u00ed, spojovac\u00ed prvky, \u0159et\u011bzy, zobrazovac\u00ed syst\u00e9my a mnoho typ\u016f b\u011b\u017en\u00fdch strojn\u00edch sou\u010d\u00e1st\u00ed. Pro projekty s omezen\u00fdm rozpo\u010dtem a bez dlouhodob\u00e9ho vystaven\u00ed vlhkosti je pozinkovan\u00e1 ocel obvykle cenov\u011b v\u00fdhodn\u011bj\u0161\u00ed volbou.<\/p>\n

Pokud bude v\u00fdrobek pou\u017e\u00edv\u00e1n venku po dlouhou dobu, ve vlhk\u00e9m prost\u0159ed\u00ed, v bl\u00edzkosti mo\u0159e nebo v kontaktu s korozivn\u00edmi l\u00e1tkami, je nerezov\u00e1 ocel obvykle lep\u0161\u00ed volbou. I kdy\u017e jsou po\u010d\u00e1te\u010dn\u00ed po\u0159izovac\u00ed n\u00e1klady vy\u0161\u0161\u00ed, jej\u00ed vynikaj\u00edc\u00ed a stabiln\u011bj\u0161\u00ed odolnost proti korozi znamen\u00e1 m\u00e9n\u011b \u00fadr\u017eby a m\u00e9n\u011b v\u00fdm\u011bn. Z dlouhodob\u00e9ho hlediska m\u016f\u017ee sn\u00ed\u017eit celkov\u00e9 n\u00e1klady na projekt.<\/p>\n

Vezm\u011bte si jako p\u0159\u00edklad na\u0161e \u0159et\u011bzy. V\u011bt\u0161ina z\u00e1kazn\u00edk\u016f, kte\u0159\u00ed pou\u017e\u00edvaj\u00ed \u0159et\u011bzy pro skladov\u00e1n\u00ed, tov\u00e1rn\u00ed za\u0159\u00edzen\u00ed, obecn\u00e9 z\u00e1v\u011bsn\u00e9 syst\u00e9my a b\u011b\u017en\u00e9 pr\u016fmyslov\u00e9 aplikace, vol\u00ed pozinkovan\u00e9 \u0159et\u011bzy, proto\u017ee pln\u011b spl\u0148uj\u00ed v\u00fdkonnostn\u00ed po\u017eadavky za ni\u017e\u0161\u00ed cenu. Pro n\u00e1mo\u0159n\u00ed aplikace, p\u0159\u00edstavy, offshore in\u017een\u00fdrstv\u00ed, zpracov\u00e1n\u00ed potravin a dlouhodob\u00e9 venkovn\u00ed pou\u017eit\u00ed v\u0161ak obvykle doporu\u010dujeme \u0159et\u011bzy z nerezov\u00e9 oceli 304 nebo 316, proto\u017ee v t\u011bchto prost\u0159ed\u00edch poskytuj\u00ed del\u0161\u00ed \u017eivotnost a spolehliv\u011bj\u0161\u00ed odolnost proti korozi.<\/p>\n

Z\u00e1v\u011br<\/h2>\n

Celkov\u011b vzato, ani pozinkovan\u00e1 ocel, ani nerezov\u00e1 ocel nejsou tou nejlep\u0161\u00ed volbou pro ka\u017edou aplikaci. Spr\u00e1vn\u00e1 volba z\u00e1vis\u00ed na tom, kde a jak bude v\u00fdrobek pou\u017eit. Pozinkovan\u00e1 ocel nab\u00edz\u00ed ni\u017e\u0161\u00ed n\u00e1klady, atraktivn\u00ed vzhled a je vhodn\u00e1 pro v\u011bt\u0161inu obecn\u00fdch aplikac\u00ed. Nerezov\u00e1 ocel poskytuje lep\u0161\u00ed odolnost proti korozi, del\u0161\u00ed \u017eivotnost a ni\u017e\u0161\u00ed n\u00e1roky na \u00fadr\u017ebu, co\u017e z n\u00ed \u010din\u00ed spolehliv\u011bj\u0161\u00ed volbu pro n\u00e1ro\u010dn\u00e9 prost\u0159ed\u00ed.<\/p>\n

Jako v\u00fdrobce \u0159et\u011bz\u016f s dlouholet\u00fdmi zku\u0161enostmi s v\u00fdrobou a exportem doporu\u010dujeme hledat d\u00e1l ne\u017e jen po\u010d\u00e1te\u010dn\u00ed kupn\u00ed cenu. P\u0159ed rozhodnut\u00edm zva\u017ete provozn\u00ed prost\u0159ed\u00ed, n\u00e1klady na \u00fadr\u017ebu a o\u010dek\u00e1vanou \u017eivotnost. U v\u011bt\u0161iny projekt\u016f je mnohem d\u016fle\u017eit\u011bj\u0161\u00ed vybrat materi\u00e1l, kter\u00fd nejl\u00e9pe odpov\u00edd\u00e1 dan\u00e9 aplikaci, ne\u017e jednodu\u0161e zvolit dra\u017e\u0161\u00ed variantu.<\/p>\n

\n

Nej\u010dast\u011bj\u0161\u00ed dotazy<\/strong><\/h2>\n

Rezav\u00ed pozinkovan\u00e1 ocel?<\/strong><\/h3>\n

Ano.<\/p>\n

Pozinkovan\u00e1 ocel v\u0161ak nerezav\u00ed tak rychle jako neo\u0161et\u0159en\u00e1 uhl\u00edkov\u00e1 ocel, proto\u017ee zinkov\u00fd povlak funguje jako bari\u00e9ra proti vzduchu a vlhkosti. Tak\u00e9 koroduje jako prvn\u00ed a poskytuje tak ob\u011btn\u00ed ochranu oceli pod n\u00ed.<\/p>\n

Jak se zinkov\u00fd povlak postupn\u011b opot\u0159ebov\u00e1v\u00e1 v d\u016fsledku t\u0159en\u00ed, n\u00e1raz\u016f nebo dlouhodob\u00e9ho vystaven\u00ed vlhkosti a soli, uhl\u00edkov\u00e1 ocel pod n\u00edm m\u016f\u017ee nakonec za\u010d\u00edt reziv\u011bt. Pozinkovan\u00e1 ocel je proto vhodn\u011bj\u0161\u00ed pro vnit\u0159n\u00ed nebo v\u0161eobecn\u00e9 venkovn\u00ed pou\u017eit\u00ed. Pro dlouhodob\u00e9 pou\u017eit\u00ed v pob\u0159e\u017en\u00edm, vlhk\u00e9m nebo korozivn\u00edm prost\u0159ed\u00ed je obvykle spolehliv\u011bj\u0161\u00ed volbou nerezov\u00e1 ocel.<\/p>\n

Je pozinkovan\u00e1 ocel vhodn\u00e1 pro venkovn\u00ed pou\u017eit\u00ed?<\/strong><\/h3>\n

Ano, ale je vhodn\u011bj\u0161\u00ed pro b\u011b\u017en\u00e9 venkovn\u00ed aplikace nebo projekty se st\u0159edn\u00edmi po\u017eadavky na \u017eivotnost.<\/p>\n

Zinkov\u00fd povlak poskytuje uhl\u00edkov\u00e9 oceli ochranu proti korozi, tak\u017ee je vhodn\u00e1 pro such\u00e9, chr\u00e1n\u011bn\u00e9 nebo m\u00edrn\u011b korozivn\u00ed venkovn\u00ed prost\u0159ed\u00ed.<\/p>\n

Pokud bude v\u00fdrobek po dlouhou dobu vystaven de\u0161ti, vysok\u00e9 vlhkosti, pob\u0159e\u017en\u00ed soln\u00e9 mlze nebo chemick\u00e9 korozi, zinkov\u00fd povlak se postupn\u011b opot\u0159ebuje a podkladov\u00e1 uhl\u00edkov\u00e1 ocel m\u016f\u017ee nakonec zreziv\u011bt. Nap\u0159\u00edklad pozinkovan\u00e9 \u0159et\u011bzy jsou vhodn\u00e9 pro b\u011b\u017en\u00e9 venkovn\u00ed z\u00e1v\u011bsn\u00e9 aplikace, zat\u00edmco \u0159et\u011bzy z nerezov\u00e9 oceli 304 nebo 316 se doporu\u010duj\u00ed pro dlouhodob\u00e9 pou\u017e\u00edv\u00e1n\u00ed v pob\u0159e\u017en\u00edch oblastech, p\u0159\u00edstavech nebo mo\u0159sk\u00e9m prost\u0159ed\u00ed.<\/p>\n

Vhodnost pozinkovan\u00e9 oceli pro venkovn\u00ed pou\u017eit\u00ed z\u00e1vis\u00ed hlavn\u011b na prost\u0159ed\u00ed, dob\u011b expozice a o\u010dek\u00e1van\u00e9 \u017eivotnosti.<\/p>\n

Co je lep\u0161\u00ed pro venkovn\u00ed pou\u017eit\u00ed, pozinkovan\u00e1 nebo nerezov\u00e1 ocel?<\/strong><\/h3>\n

Pro v\u011bt\u0161inu dlouhodob\u00fdch venkovn\u00edch aplikac\u00ed je lep\u0161\u00ed volbou nerezov\u00e1 ocel. Jej\u00ed odolnost proti korozi poch\u00e1z\u00ed ze samotn\u00e9ho materi\u00e1lu, co\u017e j\u00ed umo\u017e\u0148uje spolehliv\u011b si zachovat v\u00fdkon i p\u0159i vystaven\u00ed de\u0161ti, vlhkosti nebo soln\u00e9 mlze.<\/p>\n

Pokud m\u00e1 v\u0161ak projekt omezen\u00fd rozpo\u010det a je ur\u010den pouze pro b\u011b\u017en\u00e9 venkovn\u00ed nebo kr\u00e1tkodob\u00e9 pou\u017eit\u00ed, je pozinkovan\u00e1 ocel tak\u00e9 praktickou a cenov\u011b v\u00fdhodnou variantou. Nejlep\u0161\u00ed volba z\u00e1vis\u00ed sp\u00ed\u0161e na va\u0161em provozn\u00edm prost\u0159ed\u00ed ne\u017e na pouh\u00e9m v\u00fdb\u011bru dra\u017e\u0161\u00edho materi\u00e1lu.<\/p>\n

Stoj\u00ed nerezov\u00e1 ocel za ty p\u0159\u00edplatky?<\/strong><\/h3>\n

V mnoha p\u0159\u00edpadech ano.<\/p>\n

P\u0159esto\u017ee m\u00e1 nerezov\u00e1 ocel vy\u0161\u0161\u00ed po\u010d\u00e1te\u010dn\u00ed po\u0159izovac\u00ed cenu, obvykle vydr\u017e\u00ed mnohem d\u00e9le a vy\u017eaduje m\u00e9n\u011b \u00fadr\u017eby a m\u00e9n\u011b v\u00fdm\u011bn.<\/p>\n

Pokud bude v\u00fdrobek pou\u017e\u00edv\u00e1n venku, ve vlhk\u00fdch oblastech, pobl\u00ed\u017e pob\u0159e\u017e\u00ed nebo v jin\u00e9m korozivn\u00edm prost\u0159ed\u00ed, m\u016f\u017ee nerezov\u00e1 ocel \u010dasto sn\u00ed\u017eit celkov\u00e9 n\u00e1klady po celou dobu sv\u00e9 \u017eivotnosti. Pro vnit\u0159n\u00ed nebo obecn\u00e9 pou\u017eit\u00ed je v\u0161ak obvykle posta\u010duj\u00edc\u00ed pozinkovan\u00e1 ocel, tak\u017ee nen\u00ed t\u0159eba platit za odolnost proti korozi nav\u00edc, ne\u017e co va\u0161e aplikace vy\u017eaduje.<\/p>\n

Jak dlouho vydr\u017e\u00ed zinkov\u00e1n\u00ed?<\/strong><\/h3>\n

\u017divotnost zinkov\u00e1n\u00ed z\u00e1vis\u00ed hlavn\u011b na provozn\u00edm prost\u0159ed\u00ed a tlou\u0161\u0165ce zinkov\u00e9ho povlaku, tak\u017ee neexistuje \u017e\u00e1dn\u00e1 pevn\u00e1 \u017eivotnost.<\/p>\n

V such\u00e9m vnit\u0159n\u00edm prost\u0159ed\u00ed mohou pozinkovan\u00e9 v\u00fdrobky vydr\u017eet mnoho let. Ve vlhk\u00e9m, de\u0161tiv\u00e9m, p\u0159\u00edmo\u0159sk\u00e9m nebo prost\u0159ed\u00ed s vysok\u00fdm obsahem soli bude zinkov\u00fd povlak korodovat rychleji, co\u017e v\u00fdrazn\u011b zkracuje jeho \u017eivotnost.<\/p>\n

Pokud v\u00e1\u0161 projekt vy\u017eaduje dlouhodobou ochranu proti korozi nebo je \u00fadr\u017eba obt\u00ed\u017en\u00e1, je obvykle lep\u0161\u00ed volbou nerezov\u00e1 ocel.<\/p>\n

Je nerezov\u00e1 ocel pevn\u011bj\u0161\u00ed ne\u017e pozinkovan\u00e1 ocel?<\/strong><\/h3>\n

Ne nutn\u011b.<\/p>\n

Zinkov\u00e1n\u00ed je pouze povrchov\u00e1 \u00faprava a neur\u010duje pevnost v\u00fdrobku. Skute\u010dn\u00e1 pevnost z\u00e1vis\u00ed na z\u00e1kladn\u00edm materi\u00e1lu, tepeln\u00e9m zpracov\u00e1n\u00ed a v\u00fdrobn\u00edm standardu.<\/p>\n

V mnoha pr\u016fmyslov\u00fdch aplikac\u00edch jsou v\u00fdrobky z vysokopevnostn\u00ed pozinkovan\u00e9 uhl\u00edkov\u00e9 oceli pevn\u011bj\u0161\u00ed ne\u017e v\u00fdrobky z nerezov\u00e9 oceli 304 stejn\u00e9 specifikace. Hlavn\u00ed v\u00fdhodou nerezov\u00e9 oceli je jej\u00ed odolnost proti korozi a dlouhodob\u00e1 trvanlivost, nikoli vy\u0161\u0161\u00ed mechanick\u00e1 pevnost.<\/p>\n

Pokud je nosnost d\u016fle\u017eit\u00e1, v\u017edy zkontrolujte pevnostn\u00ed parametry produktu a p\u0159\u00edslu\u0161n\u00e9 normy, m\u00edsto abyste jej posuzovali pouze podle materi\u00e1lu.<\/p>\n

Lze pozinkovanou ocel pou\u017e\u00edt v mo\u0159sk\u00e9m prost\u0159ed\u00ed?<\/strong><\/h3>\n

Nedoporu\u010duje se pro dlouhodob\u00e9 u\u017e\u00edv\u00e1n\u00ed.<\/p>\n

S\u016fl a vlhkost v mo\u0159sk\u00e9m prost\u0159ed\u00ed urychluj\u00ed korozi zinkov\u00e9ho povlaku. S postupn\u00fdm spot\u0159ebov\u00e1v\u00e1n\u00edm nebo po\u0161kozov\u00e1n\u00edm povlaku se v\u00fdrazn\u011b zvy\u0161uje riziko koroze podkladov\u00e9 uhl\u00edkov\u00e9 oceli.<\/p>\n

Pro kr\u00e1tkodob\u00e9 pou\u017eit\u00ed nebo instalace, kter\u00e9 jsou dob\u0159e chr\u00e1n\u011bny p\u0159ed p\u0159\u00edm\u00fdm vystaven\u00edm vliv\u016fm, m\u016f\u017ee b\u00fdt p\u0159ijateln\u00e1 pozinkovan\u00e1 ocel. Pro dlouhodob\u00e9 n\u00e1mo\u0159n\u00ed aplikace je v\u0161ak lep\u0161\u00ed volbou nerezov\u00e1 ocel 316 nebo jin\u00e9 materi\u00e1ly speci\u00e1ln\u011b ur\u010den\u00e9 pro mo\u0159sk\u00e9 prost\u0159ed\u00ed.<\/p>\n

Co se stane, kdy\u017e se zinkov\u00fd povlak po\u0161kr\u00e1be?<\/strong><\/h3>\n

I kdy\u017e je zinkov\u00fd povlak po\u0161kr\u00e1ban\u00fd, okoln\u00ed zinek m\u016f\u017ee nejprve korodovat a poskytovat ochranu exponovan\u00e9 oblasti. V d\u016fsledku toho drobn\u00e9 \u0161kr\u00e1bance obvykle nezp\u016fsob\u00ed okam\u017eitou reziv\u011bn\u00ed podkladov\u00e9 oceli.<\/p>\n

Pokud je v\u0161ak \u0161kr\u00e1banec hlubok\u00fd nebo velk\u00fd, nebo pokud je v\u00fdrobek pou\u017e\u00edv\u00e1n ve vlhk\u00e9m prost\u0159ed\u00ed nebo prost\u0159ed\u00ed bohat\u00e9m na soli, zinkov\u00fd povlak se spot\u0159ebuje rychleji, co\u017e zvy\u0161uje riziko koroze uhl\u00edkov\u00e9 oceli pod n\u00edm. Pokud se zjist\u00ed zna\u010dn\u00e9 po\u0161kozen\u00ed, m\u011bl by b\u00fdt povlak co nejd\u0159\u00edve zkontrolov\u00e1n a opraven.<\/p>\n

Lze pou\u017e\u00edt spole\u010dn\u011b pozinkovan\u00e9 a nerezov\u00e9 d\u00edly?<\/strong><\/h3>\n

Ano. V such\u00e9m vnit\u0159n\u00edm prost\u0159ed\u00ed lze pozinkovan\u00e9 d\u00edly a d\u00edly z nerezov\u00e9 oceli obvykle pou\u017e\u00edvat spole\u010dn\u011b bez jak\u00fdchkoli v\u00fdznamn\u00fdch probl\u00e9m\u016f.<\/p>\n

Ve vlhk\u00e9m, pob\u0159e\u017en\u00edm nebo vlhk\u00e9m prost\u0159ed\u00ed v\u0161ak m\u016f\u017ee kontakt mezi t\u011bmito dv\u011bma kovy zp\u016fsobit galvanickou korozi, kter\u00e1 m\u016f\u017ee urychlit korozi zinkov\u00e9ho povlaku a zkr\u00e1tit \u017eivotnost v\u00fdrobku. Pokud je nutn\u00e9 je pou\u017e\u00edt spole\u010dn\u011b, doporu\u010duj\u00ed se izola\u010dn\u00ed podlo\u017eky nebo jin\u00e9 metody izolace.<\/p>\n

Jak rozezn\u00e1te pozinkovanou ocel od nerezov\u00e9 oceli?<\/strong><\/h3>\n

Nejspolehliv\u011bj\u0161\u00edm zp\u016fsobem je zkontrolovat ozna\u010den\u00ed materi\u00e1lu, zku\u0161ebn\u00ed protokoly nebo certifik\u00e1ty materi\u00e1lu.<\/p>\n

Pokud je v\u00fdrobek ozna\u010den jakosti, jako je 304 nebo 316, je obvykle vyroben z nerezov\u00e9 oceli. Pozinkovan\u00e9 v\u00fdrobky obvykle nenesou ozna\u010den\u00ed jakosti nerezov\u00e9 oceli.<\/p>\n

Pokud nejsou \u017e\u00e1dn\u00e9 ozna\u010den\u00ed, je obt\u00ed\u017en\u00e9 je rozli\u0161it pouze podle vzhledu, proto\u017ee oba maj\u00ed st\u0159\u00edbrn\u00fd kovov\u00fd povrch. U d\u016fle\u017eit\u00fdch projekt\u016f se doporu\u010duje prov\u00e9st zkou\u0161ky materi\u00e1lu nebo si od dodavatele vy\u017e\u00e1dat inspek\u010dn\u00ed zpr\u00e1vy a certifik\u00e1ty materi\u00e1lu, ne\u017e se spol\u00e9hat pouze na barvu nebo vzhled povrchu.<\/p>\n

Pro souvisej\u00edc\u00ed podrobnosti o produktech a praktick\u00e9 srovn\u00e1n\u00ed si m\u016f\u017eete tak\u00e9 p\u0159e\u010d\u00edst o Co je \u010dern\u00fd oxid? Je vhodn\u00fd pro va\u0161e \u0159et\u011bzy?<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

When purchasing hardware products, zinc-plated steel and stainless steel are two of the most common choices. 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