Indlela yokuvimbela ukugqwala kwe-aluminium?

I-aluminium engalashiwe inokumelana nokugqwala okuhle kakhulu ezindaweni eziningi, kodwa ezindaweni ezine-asidi eqinile noma ezine-alkali, i-aluminium ivamise ukugqwala ngokushesha uma kuqhathaniswa. Nalu uhlu lokuhlola ukuthi ungazivikela kanjani izinkinga zokugqwala kwe-aluminium.

Uma isetshenziswa ngendlela efanele, i-aluminiyamu inesikhathi eside sokuphila kunezinye izinto eziningi zokwakha, okuhlanganisa insimbi ye-carbon, insimbi engama-galvanized kanye nethusi. Ukuqina kwayo kuhle kakhulu. Futhi ngokuvamile iphakeme kunezinye izinto ezitholakala endaweni ene-sulphurous kanye nasolwandle.

Izinhlobo ezivame kakhulu zokugqwala yilezi:

• Ukugqwala kwe-galvanic kungenzeka lapho kukhona kokubili ukuthintana kwensimbi kanye nebhuloho le-electrolytic phakathi kwezinsimbi ezahlukene.
• Ukugqwala kwe-pitting kwenzeka kuphela lapho kukhona i-electrolyte (kungaba amanzi noma umswakama) equkethe usawoti oncibilikisiwe, ngokuvamile ama-chloride.
• Ukugqwala kweCrevice kungenzeka emifantwini emincane, egcwele uketshezi.

Ngakho, yini ongayenza ukuze ukugweme?

Nalu uhlu lwami lokuhlola ukuthi ungakugwema kanjani ukugqwala:

• Cabangela ukwakheka kwephrofayili. Ukwakhiwa kwephrofayili kufanele kukhuthaze ukomisa - ukugeleza kahle kwamanzi, ukugwema ukugqwala. Kufanele ugweme ukuba ne-aluminiyamu engavikelekile ekuthinteni isikhathi eside namanzi amile, futhi ugweme amaphakethe lapho ukungcola kungaqoqa khona bese ugcine impahla imanzi isikhathi eside.
• Qaphela amanani we-pH. Amanani e-pH angaphansi kuka-4 nangaphezulu kuno-9 kufanele agwenywe ukuze avikeleke ekugqwaleni.
• Naka imvelo:Ezimweni ezinzima, ikakhulukazi lezo ezinokuqukethwe okuphezulu kwe-chloride, ukunakwa kufanele kukhokhwe engcupheni yokugqwala kwe-galvanic. Ezindaweni ezinjalo, kunconywa uhlobo oluthile lokuhlukanisa phakathi kwe-aluminium nezinsimbi ezinhle kakhulu, njengethusi noma insimbi engagqwali.
• Ukugqwala kuyanda ngokuma:Ezinhlelweni ezivaliwe, eziqukethe uketshezi, lapho amanzi ehlala emile isikhathi eside, ukugqwala kuyanda. Ama-inhibitors ngokuvamile angasetshenziswa ukunikeza ukuvikelwa kokugqwala.
• Gwemasnjalo, izindawo ezimanzi. Okufanelekile, gcina i-aluminium yomile. Ukuvikelwa kwe-cathodic kufanele kubhekwe ezindaweni ezinzima, ezimanzi ukuze kuvinjelwe ukugqwala.