Pretreatment of Steel Electronic Chassis
Pretreatment of Steel Electronic Chassis
(OP)
I was going to use a zinc electrodeposited pretreatment per ASTM B633 including a clear chromate, on an electronic chassis that will be powder coated. Some of the flanges on the chassis will not be powdercoated to maintain electrical conductivity between them. The fabricator suggested that we use Galvanneal instead of the zinc coating. The chassis will be in a climate controlled room temperature environment. Which process is better?





RE: Pretreatment of Steel Electronic Chassis
Galvanneal typically provides a dull gray surface that does take finishes well without a lot of fuss. It's worth considering.
Mike Halloran
Pembroke Pines, FL, USA
RE: Pretreatment of Steel Electronic Chassis
1) the surface provides for higher adhesion strength of coatings compared with electroplating
2) the zinc layer is applied to the initial steel sheet (which is a small cost increase for the raw material), so you avoid the need to send a finished chassis out for electroplating (a much larger cost decrease)
RE: Pretreatment of Steel Electronic Chassis
RE: Pretreatment of Steel Electronic Chassis
http://www.alro.com/divSteel/MetalsGridCarbon_Plat...
RE: Pretreatment of Steel Electronic Chassis
RE: Pretreatment of Steel Electronic Chassis
RE: Pretreatment of Steel Electronic Chassis