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Properties of Zinc vs. Manganese Phosphated Fasteners

I am a metallurgical engineer work for a multinational engineering industry. I would like to know if there is any difference in the tribological properties of Zn-phosphated & Mn-phosphated fasteners? Is there any difference in fatigue properties?

Sachin S Ghanpathi
- India-Pune
2000

Manganese phosphate is used as a final finish plus oiling while zinc phosphate is mostly used as base to paint.

Sara Michaeli
Tel-Aviv-Yafo, Israel
2000

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