Ob peb txoj kev ntawm Acid Etching SolutionAcid etching yog cov tshuaj tseem ceeb ua haujlwm

Txoj kev hauv kev lag luam PCB, uas yuav tsim cov kua qaub etching kua pov tseg ntau. Cov kua qaub etching feem ntau muaj tooj liab, hydrochloric acid, sulfuric acid thiab oxidant. Yog tias nws tsis kho, nws yuav ua rau cov khoom pov tseg ntawm cov tooj liab siab thiab ua rau muaj kuab paug ib puag ncig loj. Tam sim no, muaj sponge copper method, electrolysis method, extraction method, neutralization method, evaporative cooling crystallization method thiab lwm txoj kev los kho acid etching tov, tab sis muaj ntau yam teeb meem.

Daim txhuam cev tooj liab txoj kev yog ntxiv cov hmoov hlau kom hnov ​​​​mob nrog cov kua qaub thiab tooj liab ions hauv cov kua qaub etching khib nyiab hauv cov kua qaub. Hlau yog oxidized rau divalent hlau ions, thiab hlau hmoov reacts nrog tooj liab kom tau sponge tooj liab thiab ferrous chloride tov tom qab pom los ntawm lim xovxwm. Nyob rau hauv txoj kev no, oxidant thiab acid tau noj nrog hlau, hydrochloric acid thiab oxidant tsis rov qab siv dua, thiab ntau cov tshuaj yuav tsum tau ntxiv rau cov kab ntau lawm. Nyob rau hauv txoj kev no, oxidant thiab acid tau noj nrog hlau, hydrochloric acid thiab oxidant tsis rov qab siv dua, thiab ntau cov tshuaj yuav tsum tau ntxiv rau cov kab ntau lawm.

Txoj kev electrolysis feem ntau yog siv tam sim no los ua diaphragm electrolysis ntawm cov kua qaub etching khib nyiab. Tooj liab yog electrolyzed ntawm lub cathode. Cov roj chlorine ntau yog tsim los ntawm cov anode, thiab cov roj chlorine yog yaj thiab nqus mus rau cov kab ntau lawm. Lub electrolytic anode yog ua los ntawm cov hlau tsis muaj nqi anode phaj. Cov roj chlorine yog qhov txaus ntshai, kim thiab siv zog, thiab qhov nce ntawm cov kua khib nyiab kuj yog ib qho teeb meem.

Txoj kev extraction yog rho tooj liab los ntawm extractants, thiab ces electrolyze tooj liab. Qhov teeb meem tseem ceeb yog qhov ntau ntawm alkaline cov ntaub ntawv xav tau los ua kom tsis muaj kua qaub dawb. Qhov kev ua tau zoo ntawm kev rho tawm kuj tseem qis heev, cov kua khib nyiab nce ntxiv, thiab kev siv hluav taws xob ntawm electrolysis kuj loj.

Neutralization txoj kev yog neutralize acid etching khib nyiab kua nrog alkaline cov ntaub ntawv los ua tooj liab hydroxide, uas yog qhuav thiab dehydrated rau tooj liab oxide. Cov kua khib nyiab tsis tuaj yeem rov qab siv dua thiab xav tau kev kho mob thib ob.

Kev kho cov txheej txheem ntawm evaporative txias crystallization txoj kev: kua qaub etching kua → evaporative txias crystallization → precipitated tooj liab chloride rau muag → precipitated etching tov yog rov qab siv rau etching kab. Txoj kev no yuav tsum muaj hluav taws xob ntau rau evaporation thiab txias, nrog cov nqi rov qab siab thiab kev nyab xeeb zoo. Txoj kev no tsis tau nthuav dav hauv kev lag luam. Cov teeb meem tseem ceeb yog kev siv hluav taws xob siab, kev sib cais ion nyuaj, thiab siab corrosivity ntawm acid etching tov, Cov kev cai rau corrosion kuj ntawm cov khoom siv rov ua dua yog siab heev.