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The Range
Handgun Discussion
Finish for a pistol?
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<blockquote data-quote="Shadowrider" data-source="post: 3080919" data-attributes="member: 3099"><p>For scratch resistance/wear only I'd agree with Gunbuffer in post #11. And I'd add salt bath nitride (Melonite, Tenifer, etc.) as a #2. The black coloring on the surface can be scratched away, but the treated surface extends several thousandths deep which is the main thing. It has great corrosion protection too.</p><p></p><p>As to B117 there really isn't a way to correlate to "real world" time. I can tell you that ASTM B117 (5% NaCl) is a pretty ruthless test. It's done at basically 100% humidity and 95 degrees F minimum. We ran 2024 and 7050 aluminum control samples with chromate conversion and chromic acid anodized samples for process verification. The controls weren't coated or protected in any way. They would be corroding in a couple of hours while the coated went over a full week (192 hours) with no corrosion signs at all. Yes aluminum will corrode. Err...Alloyed aluminum will. Pure clad aluminum sheet usually didn't but wasn't real pretty afterward.</p></blockquote><p></p>
[QUOTE="Shadowrider, post: 3080919, member: 3099"] For scratch resistance/wear only I'd agree with Gunbuffer in post #11. And I'd add salt bath nitride (Melonite, Tenifer, etc.) as a #2. The black coloring on the surface can be scratched away, but the treated surface extends several thousandths deep which is the main thing. It has great corrosion protection too. As to B117 there really isn't a way to correlate to "real world" time. I can tell you that ASTM B117 (5% NaCl) is a pretty ruthless test. It's done at basically 100% humidity and 95 degrees F minimum. We ran 2024 and 7050 aluminum control samples with chromate conversion and chromic acid anodized samples for process verification. The controls weren't coated or protected in any way. They would be corroding in a couple of hours while the coated went over a full week (192 hours) with no corrosion signs at all. Yes aluminum will corrode. Err...Alloyed aluminum will. Pure clad aluminum sheet usually didn't but wasn't real pretty afterward. [/QUOTE]
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