Quote Originally Posted by Photo Engineer View Post
Here is a quote from a patent reference ...
benzotriazole ....are also unsatisfactory in respect to rustproofing abilities. ...
That's probably a new low for a 'quoted expert source'. If you are quoting a patent for a corrosion inhibitor that is promoting itself as superior to the prior art - benzotriazole - what do think it is going to say? "Unsatisfactory to whom?" is the question to answer.

Google "Benzotriazole rustproofing". Microencapsulated benz is used in naval paints, the benz is released when the paint is scratched and bonds to the exposed metal. It isn't usually associated with steel but with preventing corrosion and tarnishing on copper and silver.

This is getting silly ... correspondence closed.