Aluminium casings - Stainless bolts - Copper washers - galvanic corrosion. Been mulling this over for a while, it's a lonely existence. In theory I agree with it (ie not to mix them in a situation where all the factor are against you), but has anyone had any first hand experience while renovating / fettling their bike. At the minute I think I will mostly use aluminium grease (also zinc grease but can't find small tins in uk) rather than copper slip on any bolts I replace. Bit of a write up here, other sites especially boating forums echo the same. forums.sohc4.net/index.php?topic=94686.30;wap2 Any thoughts - or not Cheers Gaz
you are correct in theory in the real world its not a problem in the scenario l think you are referring to stainless banjo's into alloy lt would be an issue if you used alloy bolts to hold a stainless mudguard on relative size makes a difference regards Steve
That's what I like about this forum - the members have a wealth of knowledge. They carefully consider the problem in hand using all the available information, then deliver their verdict in a clear unambiguous manner. :biggrin: Cheers Gaz
Just did that on the thread about paint stripping and you had a hissy..........make your bloody mind up.
Who me sir, not me sir. The trouble with me is I suffer from analysis paralysis. The lad had a aluminium tank, I read something about paint stripper and corrosion, thought I would put it into the mix so he could do more research and make his own decision. My experience is limited, what I wanted was a post like yours giving practical experience, but in a nice way.:biggrin: A hissy, are you sure, doesn't sound like me. Cheers, Gaz.
Seriously, you need zinc to have "galvanic" corrosion or more correctly, errosion. The zinc sacrificially erodes being an anode when an electrolyte, such as salt water, is present. Keep it dry and no corrosion or errosion should take place.FWIW, I have used SS bolts into aluminium casings for years with no problem both with and without copper slip. After all, we all happily use bright zinc plated threads into ally every time we change spark plugs - with copper slip to do the job properly, of course.hope this helps
If your experience is limited then stop adding confusion when people need help. I know nothing about knitting really so I wouldn't post on a knitting website giving "advice" that I had "read something somewhere".............................
Sorry Nigelo, Without boring the arse off you all.....it is galvanic corrosion not erosion. Galvanic corrosion - Wikipedia, the free encyclopedia Erosion is caused by abrasive friction. Corrosion and Erosion God, I know some shit.....some people say I'm full of it! :biggrin: Erosion only has one r too :wink:
22-11-12, 16:37 Your theory is flawed - 23-11-12, 16:13 here's what they should look like.............. 07-12-12, 11:24 No shit sherlock. wanker. 03-01-13, 18:22 Touchy today aren't we Arnie? 03-01-13, 18:22 04-01-13, 13:35 Damn! You got me! I know nothing. Clearly - Arnie. Or, perhaps, Shrek? Your corner of the swamp must be underpopulated if you think you're the competent one 06-01-13, 17:18 ............and you, the fount of all knowledge...........can't you work that one out for yourself? Find out and please tell us what material they are made from........give me strength........... 3-01-13, 20:17 can't stand the vacant twat. everything is "wow" or "gosh" or "my my". no wonder he's not acting anymore. 28-01-13, 19:17 rubbish all of that, sorry. As I said earlier, what I like about this forum is the members carefully consider the problem in hand using all the available information, then deliver their verdict in a clear unambiguous manner. Supervee, having read through most of your posts I fail to see what you contribute to this forum. Cheers, Gaz
FWIW, I would not use Copperslip on anything that isnt subject to really high temperatures. Its meant to lubricate using the copper particles after the grease has gone, and I have seen fretting corrosion caused by using this stuff in the wrong place, I would only use it on the exhaust system bolts. In my experience there are much better lubricants available for 'normal' bolt, such as moly paste..
