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Can we pretreat steel for phosphating in an aluminum anodizing line?

Q. Hi Tom,
I am dealing with hard anodizing, the pre treatment are hot water cleaning, alkaline cleaning, NaoH etching and deoxidising, can I use same pretreatment baths before phosphating of steel parts?

Aijazullah Tajir
- Abu Dhabi, UAE
December 5, 2013

A. Probably not. To preclean steel you'll likely need a more aggressive cleaner than for Al, and you'll likely need HCl acid step.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
December 13, 2013

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