Riveting Anodized Aluminium
Riveting Anodized Aluminium
(OP)
I am about to specify solid rivets on a black anodized aluminium sheet part. There is very little stress on this, but it should look good and I do not want corrosion. Can I have this thing riveted and then anodized, or should I have the rivet installed afterwards, and specify a relatively non-corrosive aluminium grade for the rivet?
My application is not absolutely critical at the moment, but I may have something similar later that will be critical. I would appreciate any tips, or a pointer to some literature or a website.
Thank yo very much.
JHG
My application is not absolutely critical at the moment, but I may have something similar later that will be critical. I would appreciate any tips, or a pointer to some literature or a website.
Thank yo very much.
JHG





RE: Riveting Anodized Aluminium
If I am not wrong, anodizing after riveting may cause some of the anodizing compounds (acids etc.) to be trapped between the rivets and the sheet and may promote future corrosion.
RE: Riveting Anodized Aluminium
In my company, we drill the holes for for the rivets, anodize the hole and around the hole and then install the rivets. Usually, the rivets are a finished product, which meand that they are already protected. I don't have experience with the black aluminum sheet, but I don't see how it would matter.
Coka
RE: Riveting Anodized Aluminium
Ray Reynolds
"There is no reason anyone would want a computer in their home."
Ken Olson, president, chairman and founder of Digital Equipment Corp., 1977
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Riveting Anodized Aluminium
If I am not wrong MIL-A-8625, Type III, Class 2 used to ask for 336 hr salt-spray tests. Is there any change in AMS-A-8625 which replaced MIL-A-8625?
RE: Riveting Anodized Aluminium
Ray Reynolds
"There is no reason anyone would want a computer in their home."
Ken Olson, president, chairman and founder of Digital Equipment Corp., 1977
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Riveting Anodized Aluminium
RE: Riveting Anodized Aluminium
JHG
RE: Riveting Anodized Aluminium
I omitted a very important word in my previous answer. What I ment to say is anodize TOUCH-UP, which is different from the anodizing process. You have an anodized aluminum sheet, which means that the surface configuration was changed. The anodize touch-up is applied with a brush, and there is no surface configuration change. The anodizing process is better then the touch-up, more durable, deeper corrosion protection, but the touch-up method is also widely used. If you want to anodize your aluminum sheet, you would have to strip the original anodizing, drill the holes, and re-anodize the plate. It all depends on the application of your plate, but usually the touch-up is enough.
Coka