Letter 3009

Ability of adhesive to stick to solid film lube covered part. 

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I currently have a part in production that gets manganese phosphate coated (per DOD-P-16232 [link is to spec at TechStreet], Type M, Class 1) or zinc phosphate coated (per TT-C-490, Type 1, class optional), then is solid film lubed (per MIL-L-46010, Type 2). The part is then grit blasted to remove all plating, preparing it for the application of ablative material. Only certain areas of the part have ablative applied, but the plating is completely removed over most of the part. Would it be possible to apply the ablative material to the solid film lube and still get good adhesion? Knowing how well manganese phosphate and solid film lube flake off, I am afraid it wouldn't take long before I began losing ablative material. Any thoughts would be appreciated. Thank You

Noel Wareham
- Minneapolis, MN

If the ablative coating is only required in specific areas why are you doing its surface preparation (BLASTING) to any of the other areas. Many of the jobs we process require multiple operations where masking for preparation is required to preserve the initial coating. An added masking operation may solve some problems.

Tim Martin
plating shop - Springfield, MA

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