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).
Laboratory report on corrosion tests on radiators using hard water and various chemical solutions.
| Identifier | ExFiles\Box 149a\3\ scan0040 | |
| Date | 28th July 1920 | |
| COPY. BY.{R.W. Bailey - Chief Engineer} from HCH. c. to Hs.{Lord Ernest Hives - Chair} H13/EBS. 8.20. Laboratory. RADIATORS - EYS/H28.7.20. Up to the present after five days, during which a brass tube has been in very hard water taken from a Chellaston pump, there has been practically no action in spite of keeping at a temperature of about 65°C for one third of the time. As extreme cases, we have also taken .1% Sodium hydrate solution, 1% Sodium Chloride solution and .1% Sodium Carbonate solution, each, as in the hard water test, in the presence of a small piece of mild steel and solder, and we have found that all these three are slightly affected, the greatest effect is with the 1% Sodium Chloride solution, whereas the alkaline solutions do not appear to have anything like the same corrosive action. We are continuing these tests and will report again in about a week. Hard water is not really alkaline water, and we do not think a truly alkaline town water is likely to be found anywhere in the world. HCH. R.R. 238A (100 T'S. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 643. 19-2-20) G.2618 | ||