Amaphethini wokugqwala wezinsimbi ngokujwayelekile angehlukaniswa izigaba ezimbili: ukubhujiswa okuphelele nokugqwala kwasendaweni. Futhi ukugqwala okwenziwe kwasendaweni kungahlukaniswa: Ukugqwala okukhohlisayo, ukugqwala kwe-crevice, ukugqwala kwe-crevanic, ukugqwala okuhlanganisiwe, ukugqwala okukhethiwe, ukugcwala kwengcindezi, ukukhathala kokugqwala nokugqoka.
Ukugqwayiza okuphelele kubonakala ngokugqwala okuhlukaniswe ngokufanayo ehlukaniswe ngaphandle kwensimbi, ukuze insimbi igcwale ukuncipha. Ukugqwala okuphelele kwenzeka ngaphansi kwesimo sokuthi i-Colorlosive Medium ingafinyelela zonke izingxenye zendawo yensimbi efanayo, futhi ukwakheka kanye nenhlangano yensimbi kufana.
Ukugqwala okukhohlisayo, okwaziwa nangokuthi ukugqwala okuncane kwembobo, kunguhlobo lokugqwala olugxile kububanzi obuncane kakhulu bensimbi yensimbi futhi bajule ephethini lokugqwala langaphakathi le-pore-efana.
Izimo zokucola zokuphamba ngokuvamile zihlangabezana nezinto ezibonakalayo, eziphakathi nendawo kanye ne-electrochemical:
1, ukupela ngokuvamile kwenzeka ekudluleleni okulula kwensimbi yensimbi (njengensimbi engenasici, i-aluminium) noma ingaphezulu lensimbi nge-cathodic plating.
2, ukupela kwenzeka phambi kwama-ion akhethekile, anjenge-halogen oons in medium.
I-3, ukugcwala okukhohlakele kwenzeka ngekhono elithile elibucayi elingenhla, elibizwa ngokuthi amandla okukhohlisa noma amathuba okuqhuma.
Ukugqwala kwenhlangano kuyinto eyenziwe ngensimbi emphakathini othize owonakalisayo emingceleni yokusanhlamvu noma imingcele yokusanhlamvu eduze kokugqwala, ukuze kulahlekelwe ubugqila phakathi kwezingxabano zento yokugqwala.
Ukuthuthuka okukhethiwe kubhekisa ezingxenyeni ezisebenzayo kuma-alloys amaningi ancibilikisiwe, le nqubo ibangelwa umehluko we-electrochemical ezingxenyeni ze-alloy.
I-Crevice Corrosion ukuphi ukuba khona kwe-electrolyte phakathi kwensimbi nensimbi kanye nensimbi kanye nensimbi nokwemvelo kwakha igebe elincane, ukufuduka kwaphakathi kuvinjelwe lapho kuvinjelwa indawo yokuhlala yasendaweni.
Ukwakheka kokugqwala kwe-crevice:
1, ukuxhumana phakathi kwezingxenye ezahlukahlukene zezakhiwo.
2, endaweni yensimbi yemali, okunamathiselwe, ukunamathela neminye imikhiqizo yokugqwala.
Isikhathi sePosi: Mar-15-2024