Filiform corrosion iri kuoneka zvakanyanya paaluminium

Filiform corrosion imhando yakakosha yekuora inoonekwa zvakanyanya paaluminium. Chiitiko chacho chakafanana nehonye inokambaira pasi pejasi, inogara ichitanga kubva kumucheto wakachekwa kana kukuvadzwa mumucheka.

Filiform corrosion inokura zviri nyore kana chinhu chakaputirwa chikaiswa munyu pamwe netembiricha 30/40°C uye mwando 60-90%. Iri dambudziko saka rinongogumira kunzvimbo dzemahombekombe uye rakabatana neinosuruvarisa kusanganisa kwealuminium alloys uye pre-kurapa.

Kuti uderedze filiform corrosions zvinokurudzirwa kuve nechokwadi cheiyo alkaline etching inoteverwa neadhidhi yekugeza isati yasvika chrome kutendeuka coating. Kubviswa kwealuminium pamusoro pe2g/m2 (zvishoma 1.5g/m2) inokurudzirwa.

Anodizing sekutanga kurapwa kwealuminium iteknoloji yakanyatsogadzirirwa kudzivirira filiform corrosion. Yakakosha anodization process inodiwa kana ukobvu uye porosity yeanodization layer yakakosha.