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Helicoiling before Alocrom finish

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James Staniford	22/03/2014 11:32:08
9 forum posts 2 photos	Hi Guys, Can you insert stainless steel helicoils into aluminium before an alocrom treatment? Thanks in advance
Ian P	22/03/2014 11:35:29
2747 forum posts 123 photos	I suspect not but the people doing the anodising or whatever would know. Ian P
Bubble	22/03/2014 12:38:28
75 forum posts 6 photos	Hi Jqmes Alocrom is unaffected by steel, brass or copper inserts in the articles being processed extract from anochrome.com/ alocrom website Jim
James Staniford	22/03/2014 12:44:51
9 forum posts 2 photos	Thanks Jim, that's great
Clive Hartland	22/03/2014 14:11:38
2929 forum posts 41 photos	I suggest you thoroughly flush any threaded or insert holes after Alochrom treatment, I have found that salts do stay in the holes. I find on new parts for the instruments are often not cleansed of residues. Even finding small bits of metal when the holes are blown out. The problem is that these salts can make the fixing screws lock up and snap off on dismantling. Clive
Bill Pudney	23/03/2014 03:34:52
622 forum posts 24 photos	When I had to work for a living I vaguely remember putting the following note, or something like it on drawings of aluminium bits. "Alodine/Alochrom prior to inserting thread inserts". The reason was that whilst the insert was ok with the treatment, the tiny gaps between insert and parent metal could and would retain small quantities of the stuff. Similar to Clives comment above. cheers Bill

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