Txoj kev npaj ntawm zinc immersion tov rau hluav taws xob cua sov raj

Txoj kev npaj ntawm zinc immersion tov rau hluav taws xob cua sov raj

Ua ntej, yaj zinc sulfate nyob rau hauv dej kub ntawm 70 degree, ces ntxiv sodium pyrophosphate nyob rau hauv batch. Do thaum ntxiv kom yaj tag dawb precipitate. Tom qab ntawd, ntxiv cov tshuaj fluoride thiab sodium carbonate, txuas ntxiv stirring kom tiav cov tshuaj ntxiv, thiab tom qab ntawd sim thiab kho tus nqi pH.

(Ceeb Toom: Yog tias lithium fluoride ntxiv, vim nws cov solubility tsawg, nws tau mus txog lub xeev saturation ntawm 3g / L. Tshaj lithium fluoride tuaj yeem ntim rau hauv cov khoom siv corrosion-resistant, nrog rau hauv zinc immersion tov.).

Tswj ntawm Zinc Immersion Solution

Nws yog qhov zoo tshaj plaws los tswj cov concentration ntawm zinc ions hauv zinc immersion tov nyob rau hauv thaj tsam ntawm 6g / L ~ 11g / L, thiab tseem tswj cov concentration ntawm P2O74-, tswj qhov sib piv ntawm ob, nyob rau hauv kev txiav txim. kom tau txais cov zinc txheej tuab.

Qhov kub ntawm zinc dipping tov yog feem ntau tswj ntawm 70 degree thiab 80 degree.

Lub sijhawm zinc soaking yog luv heev kom tau txais cov zinc txheej tuab. Yog hais tias lub sij hawm soaking ntev dhau lawm, zinc txheej yog tuab heev thiab xoob, thiab lub sij hawm soaking feem ntau tswj ntawm 5min thiab 15min, nrog zinc txheej thickness ntawm 2.5 μ m ~ 2.8 μ M yog zoo dua.

Secondary zinc leaching txheej txheem

Tom qab thawj txheej zinc yog raus rau hauv 20 feem pua ​​​​~ 30 feem pua ​​​​HNO3 tov, tshem tawm cov zinc txheej los yog tshem tawm cov zinc txheej hauv cov tshuaj ua kom muaj fluoride. Lub sijhawm ua haujlwm yog li 30 vib nas this. Tom qab tag nrho cov txheej zinc raug tshem tawm, ntxuav lawv nrog dej rau ob txheej zinc txheej. Cov zinc txheej kho los ntawm zinc txheej thib ob yog qhov sib txawv thiab ntom, uas tuaj yeem txhim kho lub zog sib txuas ntawm magnesium alloy substrate thiab cov txheej tom ntej.

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