Remove corroded aluminum screws

jfkal

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17 Aug 2001
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Anyone with a trick on how to remove aluminum screws corroded solid in aluminum mast? I tried: Heat, cold, WD40. Not budging :-(
 

vyv_cox

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16 May 2001
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France, sailing Aegean Sea.
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Hydrochloric acid dissolves the carbonate deposit that results from galvanic corrosion. It also attacks pure aluminium but your mast is made from an alloy that is far more resistant. Even so, take it easy with a few drops of acid at a time and wash copiously with water when complete .

See the article at the bottom of this page Corrosion
 
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