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The Water Cooler
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Taking Care of Aluminum J Frame AirLite after Exercising
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<blockquote data-quote="Shadowrider" data-source="post: 1221470" data-attributes="member: 3099"><p>I've dealt with many many many pounds of titanium. All of it was an alloy, usually 6AL4V. We used to take a 900 pound forging and machine it down to a part that weighed 47 pounds. Think jet engine mount. (I used to be in aerospace manufacturing, metal finishing, NDT, etc.)</p><p></p><p>But I've never heard of an oxidized surface on any metal referred to as being passivated. Now stainless alloys are passivated to prevent corrosion but the process is actually the reverse. The theory goes that by dipping it in a hot acid bath, not unlike what the O/P refers to in titanium etching, the iron oxide on the surface of the steel is dissolved. There are two schools of thought in the aerospace industry, one is that this is the way it works, and the other is that it's complete hogwash. After testing literally thousands of test samples in a salt fog cabinet per ASTM-B-117, I think I'm in the first camp. As for anodize it IS an oxidized surface. And an FYI most if not all anodize processes will produce a surface that is not electrically conductive. If you need to re-anodize something, you have to strip it (acid etch) and this is how you know the coating is completely gone (think ohm meter). Because if there is any coating left on it, it's not conductive, and you won't get another coating on it.</p><p></p><p>To the O/P: Just give the J frame a wipe down with a soft rag and some Ballistol after you get sweat on it. Every time you take it off after getting it sweaty! The Ballistol will neutralize the salts and it will provide some waterproofing too.</p></blockquote><p></p>
[QUOTE="Shadowrider, post: 1221470, member: 3099"] I've dealt with many many many pounds of titanium. All of it was an alloy, usually 6AL4V. We used to take a 900 pound forging and machine it down to a part that weighed 47 pounds. Think jet engine mount. (I used to be in aerospace manufacturing, metal finishing, NDT, etc.) But I've never heard of an oxidized surface on any metal referred to as being passivated. Now stainless alloys are passivated to prevent corrosion but the process is actually the reverse. The theory goes that by dipping it in a hot acid bath, not unlike what the O/P refers to in titanium etching, the iron oxide on the surface of the steel is dissolved. There are two schools of thought in the aerospace industry, one is that this is the way it works, and the other is that it's complete hogwash. After testing literally thousands of test samples in a salt fog cabinet per ASTM-B-117, I think I'm in the first camp. As for anodize it IS an oxidized surface. And an FYI most if not all anodize processes will produce a surface that is not electrically conductive. If you need to re-anodize something, you have to strip it (acid etch) and this is how you know the coating is completely gone (think ohm meter). Because if there is any coating left on it, it's not conductive, and you won't get another coating on it. To the O/P: Just give the J frame a wipe down with a soft rag and some Ballistol after you get sweat on it. Every time you take it off after getting it sweaty! The Ballistol will neutralize the salts and it will provide some waterproofing too. [/QUOTE]
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