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, kuquka 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 uphephe ukuba ne-aluminiyam engakhuselekanga ekudibaneni ixesha elide namanzi amileyo, kwaye uphephe iipokotho apho ubumdaka bunokuqokelela 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.