Filiform corrosion yog tshwm sim feem ntau ntawm txhuas

Filiform corrosion yog hom tshwj xeeb ntawm corrosion tshwm feem ntau ntawm txhuas. Qhov tshwm sim zoo li tus kab mob nkag mus rau hauv qab txheej, ib txwm pib los ntawm kev txiav ntug lossis kev puas tsuaj hauv txheej.

Filiform corrosion tsim tau yooj yim thaum cov khoom coated raug cov ntsev ua ke nrog qhov kub thiab txias 30/40 ° C thiab cov av noo 60-90%. Qhov teeb meem no yog vim li no txwv rau thaj chaw ntug dej hiav txwv thiab txuas nrog kev tsis muaj hmoo ua ke ntawm aluminium alloys thiab kev kho ua ntej.

Txhawm rau txo qis filiform corrosions nws raug qhia kom ua kom zoo alkaline etching ua raws li cov kua qaub ntxuav ua ntej chrome conversion txheej. Kev tshem tawm ntawm txhuas nto ntawm 2g / m2 (yam tsawg 1.5g / m2) yog pom zoo.

Anodizing raws li kev kho mob ua ntej rau txhuas yog cov cuab yeej tshwj xeeb tsim los tiv thaiv filiform corrosion. Yuav tsum muaj txheej txheem tshwj xeeb anodization thaum lub thickness thiab porosity ntawm txheej anodization yog qhov tseem ceeb.