Galvanized Plating
Zinc yakanyatsogadzikana mumhepo yakaoma uye haisi nyore kuchinja ruvara.Mumvura uye mumhepo yakanyorova, inopindirana neokisijeni kana kabhoni dhaikisaidhi kuumba oxide kana alkaline zinc carbonate firimu, iyo inogona kudzivirira zinc kuti isarambe ichive oxidized uye kuita basa rekudzivirira.
Zinc inonyanya kukanganiswa nekuora mu acids, alkalis uye sulfides.Iyo galvanized layer inowanzoitwa passivated.Mushure mekupfuura muchromic acid kana chromate mhinduro, iyo yakaumbwa passivation firimu haisi nyore kupindirana nemhepo yakanyorova, uye iyo anti-corrosion kugona inowedzerwa zvakanyanya.Kune zvikamu zvechitubu, zvikamu zvakatetepa-zvakakomberedzwa (madziro ukobvu <0.5m) uye zvikamu zvesimbi zvinoda kusimba kwemagetsi, kubviswa kwehydrogen kunofanirwa kuitwa, uye mhangura nemhangura alloy zvikamu hazvigone kubviswa hydrogen.
Iyo yakajairwa kugona kwe zinc haina kunaka, saka iyo zinc coating ndeye anodic coating kune akawanda masimbi.
Chishandiso: Inoita kuti galvanizing inowanzoshandiswa mumamiriro ekunze uye dzimwe nzvimbo dzakanaka.Asi kwete zvezvikamu zvekukweshana.
Cadmium plating
Zvikamu zvinosangana nemhepo yemugungwa kana mvura yegungwa uye mumvura inopisa pamusoro pe70 ℃, iyo cadmium coating yakagadzikana, ine yakasimba corrosion resistance, rubricity yakanaka, inonyungudika zvishoma nezvishoma mukunyungudutsa hydrochloric acid, asi iri nyore kwazvo kunyungudika munitric acid., isinganyungudike mualkali, uye maokisi ayo haanyungudike mumvura.
Iyo cadmium coating yakapfava kupfuura zinc coating, iyo hydrogen embrittlement yejasi idiki, uye kunamatira kwakasimba, uye mune mamwe mamiriro e electrolytic, yakawanikwa cadmium coating yakanaka kupfuura zingi coating.Asi gasi rinogadzirwa kana cadmium ranyunguduka rine chepfu, uye munyu unonyungudika wecadmium une chepfu zvakare.Mumamiriro ezvinhu akajairika, cadmium ndeye cathodic coating pasimbi uye anodic coating mumakungwa uye yakanyanya tembiricha yemhepo.
Chishandiso: Inonyanya kushandiswa kuchengetedza zvikamu kubva mukuora kwemhepo yemvura yegungwa kana mimwe minyungurudzo yemunyu yakafanana uye mhute yemvura yegungwa yakazara.Mazhinji endege, emugungwa uye emagetsi maindasitiri zvikamu, zvitubu, uye zvikamu zvakarukwa zvakaputirwa necadmium.Inogona kukwenenzverwa, phosphatized uye kushandiswa sependi primer, asi haigone kushandiswa setafuraware.
Chrome Plating
Chromium yakagadzikana zvakanyanya mumhepo ine hunyoro, alkali, nitric acid, sulfide, carbonate solutions uye organic acids, uye inonyungudika zviri nyore muhydrochloric acid uye inopisa concentrated sulfuric acid.
Pasi pekuita kwekunanga ikozvino, kana chromium layer yakashandiswa seanode, inonyungudika nyore nyore mu caustic soda solution.
Iyo chromium layer ine yakasimba adhesion, yakanyanya kuoma, 800 ~ 1000V, yakanaka kupfeka kuramba, yakasimba mwenje inopenya, uye yakanyanya kupisa kuramba.Yakaderera zvakanyanya.Izvo zvisingabatsiri chromium ndezvekuti yakaoma, brittle uye nyore kudonha, izvo zvinonyanya kuoneka kana ichiiswa kune alternating mitoro yekuvhunduka.
Panguva imwecheteyo, Iyo chrome ine porous.Metal chromium inopfuudzwa zviri nyore mumhepo kuti iite passivation firimu, nokudaro ichichinja kugona kwechromium.Chromium pasimbi nokudaro inova cathodic coating.
Kushandisa: Hazvina kunaka kurongedza zvakananga chrome pamusoro pezvikamu zvesimbi se anti-corrosion layer.Kazhinji, multi-layer electroplating (kureva copper plating → nickel → chromium) inogona kuzadzisa chinangwa chekudzivirira ngura nekushongedza.Parizvino, inoshandiswa zvakanyanya mukuvandudza kupfeka kusagadzikana kwezvikamu, kugadzirisa zviyero, kupenya kwechiedza uye magetsi ekushongedza.
Nickel plating
Nickel ine kugadzikana kwakanaka kwemakemikari mumhepo uye lye, haisi nyore kuchinja ruvara, uye inongoiswa oxidized kana tembiricha iri pamusoro pe600°C.Inonyungudika zvishoma nezvishoma mu sulfuric acid uye hydrochloric acid, asi inonyungudika nyore mu dilute nitric acid.Zviri nyore kupfuudza mune yakadzika nitric acid uye nekudaro ine yakanaka corrosion resistance.
Nickel plating yakaoma, iri nyore kupurisa, ine chiedza chepamusoro uye inowedzera aesthetics.Kukanganisa kwayo ndeye porosity, kuitira kuti ukunde kukanganisa uku, multi-layer metal plating inogona kushandiswa, uye nickel ndiyo yepakati layer.Nickel ndeye cathodic coating yesimbi uye anodic coating yemhangura.
Kushandisa: Kazhinji inoshandiswa kudzivirira kuora uye kuwedzera aesthetics, saka inowanzo shandiswa kuchengetedza machira ekushongedza.Nickel plating pazvigadzirwa zvemhangura kwakanakira anti-corrosion, asi nekuti nickel inodhura, copper-tin alloys anowanzo shandiswa pane nickel-plating.
Nguva yekutumira: Oct-11-2022