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Changing Aluminum appearance without changing surface texture

We are manufacturing hose couplings and similar equipments by aluminum die casting. We use two different aluminum alloys. One is AlSi10 containing around %1 Fe %2,3 Cu and 2,25 Zn and second one is AlMg5 containing %0,7 Si and %0,6 Fe. We need to get a semi shiny surface. Do you suggest me any surface treatment for these AL alloys just to get desired visual surfaces properties, without changing the surface texture.

AKIN MERGEN
DIE CASTING - IZMIR, TURKEY
2004

First of two simultaneous responses --

OK, I confuse easily. Just how do you propose changing the visual properties IF you do not change the surface. In real world terms, what are you trying to accomplish?

James Watts
- Navarre, Florida
2005

Second of two simultaneous responses --

Any secondary operation will effect your surface finish, no matter how lightly. Therefore, if you try to do it mechanically, you should consider dry organic media. Maybe it can also be done chemically in what is called a bright dip.

AF Kenton
retired business owner - Hatboro, Pennsylvania
2005

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