Thaum siv nickel tshuaj nag lossis daus los txhim kho corrosion kuj thiab hnav tsis kam, raws li qhov nruab nrab ntawm qhov nruab nrab ntawm cov txheej txheem hlau ntawm txhuas rods los yog ua lub ntsej muag zoo nkauj ntawm txhuas rods, cov txheej txheem no muaj ntau qhov sib txawv. Qhov txawv ntawm cov txheej txheem no los ntawm lwm cov txheej txheem yog phosphorus, kev kho cua sov thiab kev siv cov dispersions thiab seb lawv los nag nrog lwm cov hlau. Nickel chemical plating feem ntau yog siv hauv kev siv engineering. Nickel alloys yog tso rau ntawm txhuas rods nyob rau hauv acidic daws los yog alkaline daws ntawm nickel ntsev. Boron hydroxide yog siv los ua tus neeg sawv cev txo qis hauv cov txheej txheem alkaline thiab hypophosphite yog siv los ua tus neeg sawv cev hauv cov txheej txheem acidic. Ib qho tseem ceeb los nag los ntawm txoj kev tshuaj no yog tias cov nickel txheej tom qab nag lossis daus yog ib qho nyuaj heev thiab muaj kev tiv thaiv corrosion zoo thiab hnav tsis kam, uas zoo heev txhim kho cov nyhuv ntawm cov nag lossis daus.
Ib qho tseem ceeb ntawm txhuas raws li cov hlau yog tias nws yooj yim reacts nrog huab cua ntawm chav tsev kub los tsim ib tug ntom oxide zaj duab xis ntawm nws nto. Tib yam mus rau txhuas rods li txhuas cov khoom. Cov oxidation tom qab cov tshuaj nag lossis daus yog txawv. Tsuas yog tom qab kev kho cua sov tshwj xeeb tuaj yeem ua cov yeeb yaj kiab oxide no ua ke zoo nrog cov matrix. Cov kauj ruam rau txhuas pas nrig pretreatment yog raws li nram no: acid activation, cathodic txheej txheem, impregnation, matchmaking pas dej ua ke thiab txheej.
Pretreatment ntawm chemically kho aluminium rods tuaj yeem hloov cov khoom ntawm txheej txheej. Cov kev ntxhov siab sab hauv yog tso tawm ib ncig ntawm 200, thiab lub hardness yog ntxiv dag zog rau ntawm 280 lossis 600, thaum tseem txhim kho qhov hnav tsis kam. Yog tias xav tau, txheej txheej nrog cov khoom sib txawv tuaj yeem tso tau. Cov dej tsis kam ntawm cov txhuas pas nrig txheej txheej yog kho kom zoo dua thaum tswj tau cov cua txias cua sov hloov cov txheej txheem tom qab dispersion muab kev xaiv ntawm cov txheej txheem nyuaj thiab cov txheej txheem nyuaj anodized.
Aluminium rods ua ke nrog kub dot plating txhim kho hluav taws xob kev ua tau zoo thiab kev sib txuas. Nickel coatings tuaj yeem tsim los ntawm cov tshuaj tiv thaiv ntxiv, muab lawv tuaj yeem tso rau hauv ib txheej thib ob.
