Ua ntej, tshuaj oxidation
Kev kho tshuaj oxidation ntawm txhuas thiab txhuas alloys tuaj yeem muab faib ua alkaline daws thiab acidic daws raws li qhov xwm txheej ntawm cov tshuaj. Raws li qhov xwm txheej ntawm nws cov yeeb yaj kiab, nws tuaj yeem muab faib ua oxide zaj duab xis, phosphate zaj duab xis, chromate zaj duab xis thiab chromate-phosphate zaj duab xis.
(1) Technical specifications.
1. Technical specifications rau tshuaj oxidation ntawm lye.
2. Anhydrous sodium carbonate (na2co 3) 50 g/L
3.5g / l sodium chromate (Na2Cr04)
4.25 g / L sodium hydroxide (NaOH)
5. Kub 80 - 100 degrees Celsius
6. Lub sijhawm yog 10-20 feeb.
Cov oxidized qhov chaw yuav tsum tau ntxuav tam sim ntawd, passivated nyob rau hauv 20g / L chromic acid tov rau 5 mus rau 15 vib nas this ntawm chav tsev kub, ces ntxuav thiab qhuav. Cov xim yog golden daj. Cov zaj duab xis thickness yog 0.5 ~ 1um, haum rau ntshiab txhuas, txhuas-magnesium, thiab txhuas-manganese alloys.
Txoj kev no siv ntau phosphoric acid, yog li nws tseem hu ua phosphating method. Cov xim ntawm cov yeeb yaj kiab oxide yog xim tsis muaj xim rau lub teeb xiav, thiab cov yeeb yaj kiab tuab yog li 3-49m. Cov zaj duab xis txheej yog ntom, corrosion kuj yog siab, thiab qhov loj ntawm cov khoom tsis hloov tom qab oxidation. Muaj feem xyuam rau txhua yam ntawm txhuas thiab nws cov alloys.