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How to determine whether component is zinc phosphated or manganese phosphated

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SUGGESTED PHOSPHATING BOOKS
(many of these are rare; the links will only sometimes work)

"Optimization of Phosphating Process" by Vinod Prasad Sharma (2022)
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"Phosphating of Metals" by Werner Rausch (1991)
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"Phosphating & Metal Pretreatment" by D.B. Freeman (1986)
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"Phosphating of Metals" by Guy Lorin (1974)
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"Electrolytic and Chemical Conversion Coatings" by Biestek & Weber (1972)
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"A Study of Manganese Phosphating Reactions" by Joseph Menke (1971)
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"Preparation of Metals for Painting" by Samuel Spring (1966)
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"Continuous Automated Analysis and Control of phosphatizing Baths" by Edward P. Parry (1972)
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Q. I have two components which are phosphate coated, but I want to know which one is zinc or manganese phosphated? Please suggest if there any lab testing process (apart from visual) to confirm it?
The component is phosphate coated in my shop but I want to know through any lab testing.

regards

Prasad Kasar
- Pune India
November 5, 2023

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