Ukufakwa kweGalvanized
I-Zinc izinzile emoyeni owomileyo kwaye akulula ukutshintsha umbala.Kumanzi kunye nomoya omanzi, uphendula nge-oksijeni okanye i-carbon dioxide ukuze wenze i-oxide okanye ifilimu ye-alkaline ye-zinc carbonate, enokuthintela i-zinc ukuba iqhubeke i-oxidized kwaye idlala indima yokukhusela.
I-Zinc ichaphazeleka kakhulu kwi-corrosion kwi-asidi, i-alkali kunye ne-sulfide.Umaleko owenziwe igalvanized gabalala.Emva kokudlula kwi-chromic acid okanye isisombululo se-chromate, ifilimu eyenziweyo ye-passivation ayilula ukusebenzisana nomoya omanzi, kwaye amandla okulwa nomhlwa aphuculwe kakhulu.Kwiindawo zasentwasahlobo, iindawo ezinodonga oluncinci (ubukhulu bodonga <0.5m) kunye neentsimbi zetsimbi ezifuna amandla aphezulu omatshini, ukukhutshwa kwe-hydrogen kufuneka kuqhutywe, kunye neendawo zobhedu kunye ne-alloy yobhedu ayinakususwa i-hydrogen.
Ubunakho obuqhelekileyo be-zinc buyinto engalunganga, ngoko ke i-zinc yokugqoka i-anodic i-anodic coating kwiintsimbi ezininzi.
Isicelo: Yenza igalvanizing isetyenziswe ngokuqhelekileyo kwiimeko ze-atmospheri kunye nezinye iindawo ezifanelekileyo.Kodwa hayi iindawo ezikhubekisayo.
Ukufakwa kweCadmium
Amalungu anxibelelana nomoya wolwandle okanye amanzi olwandle kunye nakumanzi ashushu ngaphezulu kwe-70 ℃, i-cadmium yokwambathisa izinzile, inokumelana ne-corrosion eyomeleleyo, i-lubricity elungileyo, inyibilika ngokucothayo kwi-dilute hydrochloric acid, kodwa kulula kakhulu ukunyibilika kwi-nitric acid., ayinyibiliki kwialkali, kwaye iioksidi zayo azinyibiliki emanzini.
Ingubo ye-cadmium ithambile kune-zinc, i-hydrogen embrittlement ye-coating incinci, kwaye i-adhesion yomelele, kwaye phantsi kweemeko ezithile ze-electrolytic, i-cadmium efunyenweyo ihle kakhulu kune-zinc coating.Kodwa igesi eveliswayo xa i-cadmium inyibilika inetyhefu, kwaye ityuwa yecadmium enyibilikayo nayo iyityhefu.Ngaphantsi kweemeko eziqhelekileyo, i-cadmium yingubo ye-cathodic kwintsimbi kunye ne-anodic coating kulwandle kunye ne-atmospheres ephezulu yokushisa.
Isicelo: Isetyenziswa ikakhulu ukukhusela iinxalenye kwi-atmospheric yamanzi olwandle okanye izinyibiliko zetyuwa ezifanayo kunye nomphunga wamanzi olwandle.Uninzi lweenqwelomoya, iinxalenye zemizi-mveliso yaselwandle kunye ne-elektroniki, imithombo, kunye neendawo ezinemisonto zifakwe kwi-cadmium.Inokupholiswa, iphosphatized kwaye isetyenziswe njenge-primer yepeyinti, kodwa ayinakusetyenziswa njenge-tableware.
I-Chrome Plating
I-Chromium izinzile kakhulu kwi-atmosfera efumileyo, i-alkali, i-nitric acid, i-sulfide, izisombululo ze-carbonate kunye ne-organic acids, kwaye i-soluble lula kwi-hydrochloric acid kunye ne-asidi ye-sulfuric egxininisiweyo eshushu.
Ngaphantsi kwesenzo sangoku ngokuthe ngqo, ukuba i-chromium layer isetyenziswe njenge-anode, i-soluble ngokulula kwisisombululo se-caustic soda.
Umaleko wechromium unoncamathela owomeleleyo, ubulukhuni obuphezulu, i-800 ~ 1000V, ukuxhathisa okulungileyo kokunxiba, ukukhanya okuqinileyo, kunye nokumelana nobushushu obuphezulu.Yehle kakhulu.Ukungalungi kwechromium kukuba iqinile, inkrwinkqika kwaye kulula ukuwa, nto leyo ibonakala ngakumbi xa iphantsi komthwalo womothuko otshintshanayo.
Kwangaxeshanye, i-chrome i-porous.I-Metal chromium igqithiswa ngokulula emoyeni ukuze yenze ifilimu yokwenziwa kwe-passivation, ngaloo ndlela itshintsha amandla echromium.I-Chromium kwi-iron ijika ibe yi-cathodic coating.
Isicelo: Ayifanelekanga ukuba iplate ye-chrome ngokuthe ngqo kumphezulu wamalungu entsimbi njengomaleko ochasene nomhlwa.Ngokubanzi, i-electroplating enemigangatho emininzi (okt ukucwenga kobhedu → nickel → chromium) inokufikelela injongo yokuthintela umhlwa kunye nokuhombisa.Okwangoku, isetyenziswa ngokubanzi ekuphuculeni ukunyanzeliswa kwamacandelo, ukulungisa imilinganiselo, ukukhanya okukhanyayo kunye nezibane zokuhlobisa.
I-Nickel plating
I-nickel inozinzo olululo lwekhemikhali kwi-atmosfera kunye ne-lye, akulula ukutshintsha umbala, kwaye i-oxidized kuphela xa ubushushu bungaphezu kwama-600°C.Inyibilika kancinane kwi-asidi yesulfuric kunye ne-hydrochloric acid, kodwa inyibilika ngokulula kwi-dilute nitric acid.Kulula ukudlula kwi-asidi ye-nitric egxininisiweyo kwaye ngenxa yoko inokumelana ne-corrosion.
I-Nickel plating inzima, kulula ukuyipolisha, inokukhanya okuphezulu kwaye yongeza ubuhle.Ukungalungi kwayo yi-porosity yayo, ukuze unqobe le ntsilelo, i-multi-layer metal plating ingasetyenziswa, kwaye i-nickel ngumaleko ophakathi.I-Nickel yingubo ye-cathodic yentsimbi kunye ne-anodic yokugqoka ubhedu.
Isicelo: Ngokuqhelekileyo isetyenziselwa ukukhusela i-corrosion kunye nokwandisa i-aesthetics, ngoko isetyenziselwa ukukhusela iingubo zokuhlobisa.Ukufakwa kwe-nickel kwiimveliso zobhedu kulungele ukulwa nokubola, kodwa ngenxa yokuba i-nickel ibiza kakhulu, ii-alloys ze-copper-tin zihlala zisetyenziswa endaweni ye-nickel-plating.
Ixesha lokuposa: Oct-11-2022