Weldable Lead Phosphate - Its Properties and Use 670075

A new phosphate coating for steel -- lead phosphate -- has been developed. Unlike other phosphate coatings, lead phosphate does not impair the weldability of the steel substrate. In addition to this important and valuable property, a lead phosphate coating can be formed on steel near room temperature by a simple, single pass spray technique. This type of coating, properly applied, affords good protection against rust, reduces friction in drawing operations, yields an excellent base for electrocoating systems, and is highly resistant to removal by all but the strongest alkalis and mineral acids.


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