Galvanizing e bua ka theknoloji ea phekolo ea holim'a metsi ea ho roala lesela la zinki holim'a tšepe, motsoako kapa lisebelisoa tse ling ka morero oa ho thibela botle le mafome.
Zinc e qhibiliha ka acid le alkali, kahoo e bitsoa amphoteric metal.Zinc e fetoha hanyane moeeng o omileng.Moea o mongobo, bokaholimo ba zinki bo tla etsa filimi e teteaneng ea zinki ea carbonate.E na le sulfur dioxide, hydrogen sulfide le Marine atmosphere, zinki corrosion. ho hanyetsa hoa fokola, haholo-holo mocheso o phahameng le mongobo o phahameng o nang le sepakapaka sa organic acid, ho roala zinki ho bonolo ho corroded.The standard electrode potential of zinki is -0.76v.Bakeng sa matrix a tšepe, seaparo sa zinki ke sa anodic coating, e sebelisoang haholo ho thibela ho bola ha tšepe.Ts'ebetso ea eona e sireletsang e na le kamano e kholo le botenya ba ho roala.Lintho tse sireletsang le tse khabisitsoeng tsa ho roala zinki li ka ntlafatsoa haholo ka passivation, staining kapa ho roala ka moemeli ea sireletsang.
Molao-motheo ke ho ka potlako oxidize holim'a tšepe le lihlahisoa tsa tšepe ho theha le letso-letso oxide filimi sireletsa layer.Ho na le tse peli tse atisa ho sebelisoa mekhoa ea blackening: setso alkaline futhumatsang blackening le morao blackening ka mocheso kamoreng.But phello ea mocheso kamoreng blackening tshebetso. ka tšepe e tlaase ea carbon ha e ntle.Ho molemo ho soeufatsa tšepe ea A3 ka alkali.Alkalescent blackening e arotsoe ka likaroloana, e boetse e e-ba le blackening le tse peli tse ntšo tse khethollang.Likarolo tse kholo tsa joala bo ntšo ke sodium hydroxide le sodium nitrite.Mocheso o hlokahalang bakeng sa ho fifala ke ka bophara, ho tloha ho likhato tse ka bang 135 ho isa ho tse 155 tsa Celsius, 'me u fumana sebaka se setle, empa ho nka nako e itseng. ho qoelisoa ka oli ea passivation ka mor'a ho ba letšo.Boleng ba ho ba letšo bo atisa ho fapana le mekhoa ena.Metsi a moriana a "bluing" a amohela alkaline oxidat.ion kapa acid oxidation.Ts'ebetso ea ho etsa filimi ea oxide holim'a tšepe holim'a tšepe ho thibela kutu e bitsoa "bluing".Filimi ea oxide e entsoeng holim'a tšepe e ntšo ka mor'a phekolo ea "bluing", karolo e ka ntle ke haholo-holo ferric oxide le karolo e ka hare ke ferrous oxide.
Li-bolts tse matla haholo li sebelisoa ka kakaretso manonyeletsong a bohlokoa, ho itšetlehile ka tsitsipano e kholo le ho kuta.Mohato oa ho qetela oa ts'ebetso ea bolt ke phekolo ea mocheso, e tsejoang e le ho tima, ho eketsa matla a liboutu. liboutu tsa galvanizing.Hangata hydrogen embrittlement e tšoauoa ka ho lieha ho robeha.Sena se fokotsa matla a liboutu tse matla a phahameng.Ka hona, bokaholimo bo botšo bo hlahisoang ke pheko e futhumatsang ea liboutu tse matla haholo ke filimi e batlang e tsitsitse ea oxidation.E ke ke ea rusa ha e e-ba le mafome. ha e kopane le lintho tse senyang.
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Nako ea poso: Sep-09-2019