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Post parkerizing (phosphoric acid/manganese dioxide) oil treatment

What oil treatment is recommended following final rinse?

R.W.Rexford
- Seattle,Washington

It depends on how much corrosion protection you want, and what you want the part to look like. You can use a water displacing oil or a water soluble (emulsion) oil. Either will give good corrosion protection. Do you want the part to look oily? Dry? You can adjust the oil/water ratio with the emulsion. You can also get water displacing oils that will leave either a slightly oily film, or will leave a dry-to-the-touch finish. It really boils down to the application.

Dan Brewer
chemical process supplier - Gurnee, Illinois

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