Waya wothira - njira yamankhwala yochotsera zokutira zinki

Waya wamagalasimu ntchito kwa nthawi, pamwamba pa kanasonkhezereka wosanjikiza adzavunda, kugwa, choncho zimakhudza kukongola kanasonkhezereka waya, kungolola pamwamba pa kanasonkhezereka wosanjikiza zonse kuchotsedwa, pambuyo kupukuta, kukonzanso ❖ kuyanika, kotero. kuonetsetsa kuti kanasonkhezereka waya zambiri ntchito yaitali.

Choyamba, kufunika kwa sodium hydroxide 200 ~ 300g / L sodium nitrite 100 ~ 200g/L madzi kuwonjezera 1L kuti muthe kuchotsa mbali zofunika kwambiri ndi zitsulo waya ndi zina zotero.Kutentha kwa mankhwala ndi 100 ℃, ndipo nthawi ndi mpaka kuyeretsedwa.
Kutetezedwa kwa kupaka zinki pazitsulo zachitsulo kumakhala ndi mfundo ziwiri: kumbali imodzi, ngakhale nthaka imakhala yogwira ntchito komanso yosavuta kutulutsa oxidize kuposa chitsulo, koma filimu yake ya oxide si yotayirira komanso yophatikizika ngati iron oxide.Kuchuluka kwa okusayidi wosanjikiza komwe kumapangidwa pamwamba kumalepheretsa kuwonjezereka kwa zinki mkati.Makamaka pambuyo passivation wamalatawosanjikiza, pamwamba pa oxide wosanjikiza kwambiri wandiweyani ndi wandiweyani, palokha ali mkulu makutidwe ndi okosijeni kupewa.
Komano, pamene pamwamba pamalatawosanjikiza ndi kuonongeka, kuvumbulutsa mkati chitsulo masanjidwewo, chifukwa nthaka yogwira kuposa chitsulo, pa nthawi iyi, nthaka imakhala ndi udindo wa nsembe nthaka anode, nthaka adzakhala oxidized pamaso chitsulo, kuteteza wosanjikiza chitsulo sichidzawonongeka.