From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Proposed scheme for tinning using a chemical cleaner and a molten fluxing solution.
| Identifier | ExFiles\Box 154a\1\ scan0158 | |
| Date | 1st May 1929 | |
| - 2 - BY9/G.1.5.29. in some way with Firth-Derihons. It is the latter Company that I would propose to bring into the issue definitely. I am certain that ultimately the best scheme for tinning is to use a chemical Crawshawpol cleaner to remove the oil, secondly scrub with wet powdered pumice (the operator using rubber gloves), and then dip in the molten fluxing solution, then wiping off and dipping in a molten mixture of 50/50 ammonium chloride and zinc chloride held about 50° above their melting point. If this process is properly carried out I am certain that chemical tinning will result, and the correct formation of the tin iron alloy cannot be missed. BY.{R.W. Bailey - Chief Engineer} | ||