INDUSTRI NYHETER

What is the reason for the surface of the aluminum profile at normal temperature blackening? How to deal with it?

2019-05-05
The reason:
1 fett, rost och skal inte avlägsnas;
2 After the blackening, the residual liquid is not washed;
3 parts are shaking too fast;
4 delar överlappar eller misslyckas med att vända.

Närma sig:
1 strengthen pre-treatment, degreasing and pickling;
2 Efter svullningen ska den återstående vätskan tvättas;
3 parts shaking speed should be appropriate;
4 parts should be flipped to prevent overlap.