Process for phosphate conversion coating treatment

Details Process for phosphate conversion coating treatment Process for phosphate conversion coating treatment

C - Chemistry, Metallurgy

23

F

148/17, 362/31

C23F 7/10 (1980.01)

Patent

CA 1082575

Abstract of the Disclosure: A process for treatment of phosphate conversion coating for iron and steel which includes a multi-step water rinsing stage after the conversion coating stage, which comprises subjecting a part of the rinsing water used therein to a reverse osmosis treatment, returning the concentrated liquid thereof to the conversion coating stage, and using the filtrate as replenishing water for the conversion coating and/or the digressing and water rinsing stages after subjecting it to the ion exchange treatment. - 1 -

276568

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