48001

Anodizing Titanium  

February 29, 2008

I am interested in what electrolyte is used to anodize titanium for subsequent adhesive bonding.

Paul D. Stransky, CEF
retired - N. Grosvenordale, Connecticut

Depends what you want out of the bond. If it is structural then you may like to look at an alkaline system such as AMS2488 [link is to spec at TechStreet]. If it is simply to get things to adhere you could consider sulphuric acid anodising, gives a very thin blue coating, nanometers thick.

You may consider other methods ass well, such as wet abrasive blasting the surface or alkaline peroxide oxidation. The wet blast will not give a durable bond for hot or humid conditions, nor will the sulphuric acid anodising. If bonding for operations in hot and/or humid conditions you do need either alkaline anodising or alkaline peroxide oxidation.

Brian Terry
Aerospace - Yeovil, Somerset, UK

I have had success using a fluoride phosphate and using a chemfilm coating to improve adhesion for aerospace paint on titanium.

Jim Dedmon
- Ventura, California

I am working in a scientific Iraqi center, becoming interested in surface engineering especially in anodising process, so my question is: to anodize pure titanium ,what is the effective procedures used? how can we decide that are the optimum requirements to pre-anodising treatment.thanks

Dr.shrok abdullah
ministry of science and technology - baghdad, Iraq

Hi, Dr. Shrok. A good starting point is probably AMS2488 [link is to spec at TechStreet]. Good luck.

Regards,

Ted Mooney, P.E.  finishing.com Brick, New Jersey