Nguwuphi umahluko phakathi kokucwenga kwe-zinc, ukucwenga kwe-cadmium, ukucwenga kwechromium, kunye nokufakwa kwe-nickel kumbhobho wentsimbi kunyeintsimbi bar?
Iimpawu: I-zinc izinzile kumoya owomileyo kwaye ayiguquki lula.Kwi-atmospheres yamanzi kunye ne-fumid, isabela nge-oksijini okanye i-carbon dioxide ukuze yenze i-oxides okanye iifilimu ze-alkaline zinc carbonate, ezinokuthintela i-zinc ukuba iqhubeke i-oxidize kwaye idlale indima yokukhusela.I-Zinc ichaphazeleka kakhulu kwi-corrosion kwi-acids, alkali, kunye ne-sulfides.Iingubo ezifakwe igalvanized ngokubanzi zifumana unyango lwe-passivation.Emva kokugqithisa kwi-chromic acid okanye isisombululo se-chromate, ifilimu ye-passivation eyakhiweyo ayichatshazelwa lula ngumoya ofumileyo, iphucula kakhulu amandla ayo okulwa nokubola.Kwiindawo zentwasahlobo, iindawo ezinodonga oluncinci (ubukhulu bodonga <0.5m), kunye neentsimbi zetsimbi ezifuna amandla aphezulu omatshini, ukukhutshwa kwe-hydrogen kufuneka kuqhutywe, ngelixa ubhedu kunye nobhedu lwe-alloy lungenakufuna ukususwa kwe-hydrogen.Ukufakwa kweZinc kuneendleko eziphantsi, ukusetyenzwa okufanelekileyo, kunye neziphumo ezilungileyo.Umgangatho onokwenzeka we-zinc awulunganga, ngoko ke i-zinc plating yingubo ye-anodic kwiintsimbi ezininzi.Isicelo: I-galvanizing isetyenziswa ngokubanzi kwiimeko ze-atmospheric kunye nezinye iindawo ezifanelekileyo.Kodwa akufanele isetyenziswe njengenxalenye yengxabano
2.Ukufakwa kweCadmium
Iimpawu: Kwiindawo ezidibana nomoya wolwandle okanye amanzi olwandle, kwaye kumanzi ashushu angaphezu kwama-70 ℃, i-cadmium plating izinzile, inokumelana ne-corrosion eyomeleleyo, i-lubrication elungileyo, kwaye inyibilika ngokucotha kwi-dilute hydrochloric acid.Nangona kunjalo, inyibilika kakhulu kwi-nitric acid, ayinyibiliki kwialkali, kwaye iioksidi zayo nazo azinyibiliki emanzini.I-Cadmium yokwambathisa ithambile kune-zinc yokwambathisa, inobuqhophololo obuncinci be-hydrogen kunye nokuncamathela okuqinileyo.Ngaphaya koko, phantsi kweemeko ezithile ze-electrolysis, i-cadmium efunyenweyo yokwambathisa intle ngakumbi kune-zinc.Kodwa igesi eveliswa yicadmium ngexesha lokunyibilika inetyhefu, kwaye iityuwa zecadmium ezinyibilikayo nazo zinetyhefu.Ngaphantsi kweemeko eziqhelekileyo, i-cadmium yingubo ye-cathodic kwintsimbi, kunye ne-anodic coating kwi-atmospheres yolwandle kunye nobushushu obuphezulu.Ukusetyenziswa: Isetyenziswa ikakhulu ukukhusela iinxalenye kukonakala emoyeni okubangelwa ngamanzi olwandle okanye izinyibiliko zetyuwa ezifanayo kunye nomphunga wamanzi olwandle.Amalungu amaninzi kuhambo lwenqwelomoya, ukuhamba ngenqanawa, nakwimizi-mveliso ye-elektroniki, imithombo yamanzi kunye neenxalenye ezinemisonto zityatyiswe ngecadmium.Inokupholiswa, i-phosphated, kwaye isetyenziswe njenge-substrate yepeyinti, kodwa ayinakusetyenziswa njenge-tableware.
Iimpawu: I-Chromium izinzile kakhulu kwi-atmospheres efumileyo, i-alkaline, i-nitric acid, i-sulfide, i-carbonate solutions, kunye ne-organic acids, kwaye i-soluble ngokulula kwi-hydrochloric acid kunye ne-acid concentrated sulfuric acid.Ngaphantsi kwesenzo sangoku ngokuthe ngqo, ukuba i-chromium layer isetyenziswe njenge-anode, i-soluble ngokulula kwisisombululo se-caustic soda.Umaleko wechromium unokuqina okuqinileyo, ubunzima obuphezulu, i-800-1000V, ukumelana nokunxiba kakuhle, ukubonakaliswa kokukhanya okuqinileyo, kunye nokumelana nobushushu obuphezulu.Ayitshintshi umbala ongaphantsi kwe-480 ℃, iqala uku-oxidize ngaphezulu kwe-500 ℃, kwaye iyancipha kakhulu ubulukhuni kwi-700 ℃.Ukungalungi kwayo kukuba ichromium iqinile, ibhityile, kwaye iyathandeka kwi-detachment, ebonakala ngakumbi xa iphantsi kwemithwalo yempembelelo etshintshanayo.Kwaye ine-porosity.I-metal chromium igqithiswa lula emoyeni ukuze yenze ifilim ye-passivation, ngaloo ndlela itshintsha amandla echromium.Ke ngoko, ichromium iba yicathodic coating kwintsimbi.Isicelo: Ukucwenga ngokuthe ngqo kwechromium kumphezulu wamalungu entsimbi njengomaleko ochasene nomhlwa akulunganga, kwaye kuphunyezwa ngokubanzi ngokufakwa kwe-electroplating yobhedu (oko kukuthi i-copper plating → nickel → chromium) ukuphumeza injongo yokuthintela umhlwa nokuhombisa.Okwangoku, isetyenziswa ngokubanzi ekuphuculeni ukuxhathisa ukunxiba kwamalungu, ukulungisa imilinganiselo, ukukhanya okukhanyayo, kunye nezibane zokuhombisa.
i-nickel plating
Iimpawu: I-Nickel inozinzo oluhle lweekhemikhali kwi-atmosfera kunye nesisombululo se-alkaline, ayiguquki lula, kwaye i-oxidized kuphela kumaqondo okushisa angaphezu kwe-600 ° C. Inyibilika ngokukhawuleza kwi-sulfuric acid kunye ne-hydrochloric acid, kodwa i-soluble lula kwi-dilute nitric acid.Kulula ukudlula kwi-asidi ye-nitric egxininisiweyo kwaye ngenxa yoko inokumelana ne-corrosion elungileyo.I-nickel i-coating inobunzima obukhulu kwaye kulula ukuyisebenzisa.
I-Meta entsha yeGapowerl Inkampani igxile ekuboneleleni ngechrome epleyitiweyo, igalvanized, imibhobho yentsimbi enenickel kunye neentsimbi ezingqukuva.Inkampani inesitokhwe seetoni ezingama-20000 zemibhobho yentsimbi ejikelezayo.Sinokubonelela ngeenkcukacha ezahlukeneyo zemibhobho yentsimbi, imivalo engqukuva, imibhobho yentsimbi epholisiweyo, kunye neeshafu ezipholisiweyo, kubandakanywa nemigangatho yaseMelika, isiJamani, isiJapan kunye neYurophu.Wamkelekile ukubuza.
Ixesha lokuposa: Oct-17-2023