Daim iav tsim txoj kev
Muaj ob txoj hauv kev rau kev ua cov iav los ua ib qho kev pom qhov chaw: tshuaj lom neeg cov nyiaj plating thiab lub tshuab nqus tsev evaporation. Feem ntau siv yog chemical silver plating. Txoj kev no yog kom yaj nyiaj nitrate nyob rau hauv dej, ntxiv ammonia thiab sodium hydroxide tov thiab dilute nws mus rau hauv silver hydroxide ammonia complex ntsev los ua ib tug silver plating tov. Invert qab zib los yog formaldehyde, poov tshuaj sodium tartrate tov yog siv los txo cov tshuaj. Tom qab txiav, ntug kev sib tsoo (yog tias tsim nyog, sib tsoo thiab polishing), thiab kev ntxuav saum npoo, iav yog sensitized nrog ib tug dilute tov ntawm stannous chloride, ces ntxuav, thiab ces lub nto yog tam sim ntawd immersed nyob rau hauv ib tug sib tov ntawm nyiaj plating tov thiab txo cov tshuaj. . Tom qab daim iav saum npoo tsim, nws raug ntxuav thiab tom qab ntawd tooj liab plating thiab tiv thaiv xim tuaj yeem siv tau. Lub tshuab nqus tsev evaporation txoj kev yog los ntxuav lub khob, muab tso rau hauv ib lub tshuab nqus tsev vacuum degree ntawm 0.1 mus rau 10Pa, thiab energize lub kauv tungsten hlau. Qhov kub thiab txias generated ua rau cov aluminium alloy nyob rau hauv lub kauv kom evaporate mus rau hauv lub gaseous lub xeev thiab tso rau ntawm iav nto los ua ib daim iav nto. Ib rab phom hluav taws xob kuj tuaj yeem siv los hloov tungsten hlau rau cua sov. Txoj kev nqus evaporation tuaj yeem ua cov hlau du rau hauv daim iav.
Daim iav yooj yim ua hauv tsev
Plating O. Ib daim iav ntawm 5 square metres yuav tsum muaj 5 grams nyiaj nitrate, 10-15 milliliters ntawm ammonia (25%), 2 grams sodium hydroxide, 1.3 grams qabzib, 25 milliliters cawv, thiab me ntsis stannous chloride. . Npaj daws A ua ntej. Muab cov nyiaj nitrate tso rau hauv qhov huv, tsis muaj roj 500 milliliters khob khob, ntxiv 100 milliliters dej distilled kom yaj, thiab ntxiv ammonia dropwise, stirring thaum ntxiv. Ib tug grey precipitate tshwm thaum xub thawj; txuas ntxiv ntxiv ammonia kom txog thaum lub precipitate yog yaj tag. Tom qab cov tshuaj tau qhia meej, ntxiv 2 grams sodium hydroxide thiab 50 milliliters dej kom yaj nws, ces ncuav rau hauv thiab txias.
Raw khoom thiab cov kev xav tau:
Lub khob yuav tsum tiaj tus, flawless, pob tshab iav tsis muaj npuas nyob nruab nrab;
Silver nitrate, cov ntsiab lus siab dua 99.5%;
Ammonia, qhov concentration yog 25-28%;
Potassium sodium tartrate, cov khoom siv tshuaj ntshiab.
