The Poly-Lube® surface is file-hard (varies with alloy).
Typically, coating hardness is determined by a point loading indention test; however, this test is not an accurate measurement of Poly-Lube® hardness, as the coating tends to crush under concentrated point loading due to the softer under-metal (aluminum). POLY-METAL FINISHING INC. uses a more viable and frequently used test, the Vickers Micro Hardness Test, to evaluate hardness. This test can be converted into a Rockwell equivalency reading.
Our test results on 6061 aluminum indicate that surfaces treated with PolyLube® withstood corrosion in a 5% salt spray test for nearly 1,000 hours, as opposed to less than 400 hours for hard coat anodizing. This is a drastic improvement of 120%!
Results vary depending on the alloy of the material and the surface finish. For the most accurate results, submit a sample of the alloy and a description of the finish you intend to use. After processing, we'll return the alloy to you to evaluate.