Ukuthintela njani ukubola kwealuminiyam?

I-aluminiyam engaphathwanga inokumelana nokugqwesa okuhle kakhulu kwiindawo ezininzi, kodwa kwindawo eneasidi eyomeleleyo okanye yealkaline, ialuminiyam iqhele ukugrumba ngokukhawuleza. Nalu uluhlu lokutshekisha ngendlela onokuthi uthintele ngayo iingxaki ze-aluminiyam ye-corrosion.

Xa isetyenziswe ngokuchanekileyo, i-aluminiyam inobomi obude kunezinye izinto ezininzi zokwakha, kubandakanywa intsimbi yekhabhoni, intsimbi ekhandiweyo kunye nobhedu. Ukomelela kwayo kubalaseleyo. Ikwaphakamile ngokubanzi kunezinye izinto ezikwindalo engqonge isalfure kakhulu naselwandle.

Ezona ndidi zixhaphakileyo zomhlwa zezi:

• I-galvanic corrosion ingenzeka apho kukho uqhagamshelwano lwesinyithi kunye nebhulorho ye-electrolytic phakathi kweentsimbi ezahlukeneyo.
• I-Pitting corrosion yenzeke kuphela xa kukho i-electrolyte (nokuba ngamanzi okanye ukufuma) equkethe iityuwa ezinyibilikileyo, ngokuqhelekileyo i-chlorides.
• Umhlwa unokwenzeka kwimingxuma emxinwa, ezaliswe lulwelo.

Ngoko ke, yintoni onokuyenza ukuze uyiphephe?

Nalu uluhlu lwam lokujonga indlela yokuthintela umhlwa:

• Qwalasela uyilo lweprofayile. Uyilo lweprofayili kufuneka lukhuthaze ukomisa - ukukhupha kakuhle, ukuphepha ukubola. Kufuneka ukuphephe ukuba ne-aluminiyam engakhuselekanga ekudibaneni ixesha elide namanzi amileyo, kwaye uphephe iipokotho apho ukungcola kunokuqokelela khona kwaye ke ugcine imathiriyeli imanzi ixesha elide.
• Qwalasela amaxabiso e-pH. Amaxabiso e-pH angaphantsi kwe-4 kwaye aphezulu kune-9 kufuneka agwenywe ukukhusela kwi-corrosion.
• Nika ingqalelo kokusingqongileyo:Kwiindawo ezinzima, ngakumbi ezo zinomxholo ophezulu we-chloride, ingqalelo kufuneka ihlawulwe kumngcipheko we-galvanic corrosion. Kwiindawo ezinjalo, kunconywa uhlobo oluthile lokugquma phakathi kwe-aluminiyam kunye neentsimbi ezihloniphekileyo, ezifana nobhedu okanye isinyithi esingenasici.
• Umhlwa uyenyuka ngokuma:Kwiinkqubo ezivaliweyo, ezinolwelo, apho amanzi ahlala emile ixesha elide, ukubola kuyanda. Ii-inhibitors zihlala zisetyenziselwa ukubonelela ngokhuseleko lokutya.
• Ziphephesindalo yonke, emanzi. Ngokufanelekileyo, gcina i-aluminium yomile. Ukukhuselwa kweCathodic kufuneka kuthathelwe ingqalelo kwiindawo ezinzima, ezimanzi ukukhusela ukubola.