I-Filiform corrosion ibonakala kakhulu ku-aluminium

I-Filiform corrosion uhlobo olukhethekile lokugqwala oluvela kakhulu ku-aluminium. Lesi simo sifana nesibungu esinwabuzelayo ngaphansi kwengubo, ngaso sonke isikhathi siqala onqenqemeni olusikiwe noma umonakalo ongqimbeni.

I-Filiform corrosion ikhula kalula lapho into eboshiwe ichayeka kusawoti kuhlanganiswe nezinga lokushisa elingu-30/40°C kanye nomswakama ohlobene no-60-90%. Ngakho-ke le nkinga ilinganiselwe ezindaweni ezisogwini futhi ixhunywe nenhlanganisela eneshwa yama-alloys e-aluminium kanye nokwelashwa kwangaphambili.

Ukuze unciphise ukugqwala kwe-filiform kuyelulekwa ukuthi kuqinisekiswe ukufakwa kahle kwe-alkaline okulandelwa ukugeza okune-acidic ngaphambi kokuguqulwa kokuguqulwa kwe-chrome. Kunconywa ukususwa kwendawo ye-aluminium engu-2g/m2 (ubuncane be-1.5g/m2).

I-anodizing njengokwelashwa kwangaphambili kwe-aluminium ubuchwepheshe obuthuthukiswe ngokukhethekile ukuvimbela ukugqwala kwe-filiform. Inqubo ekhethekile ye-anodization iyadingeka lapho ukujiya kanye ne-porosity yongqimba lwe-anodization kubaluleke kakhulu.