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Treasure Hunting
Cleaning Your Finds
Electrolysis for cleaning rust
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<blockquote data-quote="Marked" data-source="post: 30805" data-attributes="member: 1246"><p>Need to be careful with copper as it can be <em>much</em> more reactive in acid solutions, and you may destroy your piece if not careful.</p><p></p><p>I have had some success using oxalic acid (quite a mild acid) solutions for brass and copper - I have purchased oxalic acid crystals as timber rejuvenator from hardware stores. It can also takes rust stains out of timber.</p><p></p><p>For rusty steel, dunking in a 6:1 water and hydrochloric acid (spirits of salts) mix will loosen the rust - it takes a long time for this solution to overly affect the un-oxidized portion of the iron/steel.</p><p></p><p>As for electrolytic cleaning; ideal results may be obtained by using different electrolytes for different materials...and being able to control voltages can help target removal of specific compounds without harming the parent piece.</p></blockquote><p></p>
[QUOTE="Marked, post: 30805, member: 1246"] Need to be careful with copper as it can be [i]much[/i] more reactive in acid solutions, and you may destroy your piece if not careful. I have had some success using oxalic acid (quite a mild acid) solutions for brass and copper - I have purchased oxalic acid crystals as timber rejuvenator from hardware stores. It can also takes rust stains out of timber. For rusty steel, dunking in a 6:1 water and hydrochloric acid (spirits of salts) mix will loosen the rust - it takes a long time for this solution to overly affect the un-oxidized portion of the iron/steel. As for electrolytic cleaning; ideal results may be obtained by using different electrolytes for different materials...and being able to control voltages can help target removal of specific compounds without harming the parent piece. [/QUOTE]
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Treasure Hunting
Cleaning Your Finds
Electrolysis for cleaning rust
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