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 finding on preventing the hardening of Nitralloy Steel via Nickel Plating.
| Identifier | ExFiles\Box 154a\1\ scan0197 | |
| Date | 19th February 1930 | |
| BF. HS.{Lord Ernest Hives - Chair} H12/HC.19.2.30. X4469 Laboratory. Re Prevention of Hardening of Nitralloy Steel. As a result of extensive work done in the Laboratory it would appear that the most efficient way of preventing the nitriding of nitralloy steel is Nickel Plating. It should be remembered however that a fairly good Nickel Plate is essential; a porous one would allow the ammonia gas to penetrate somewhat. Moreover it should also be noted that the thickness of the Nickel should be about 0.001". We have found that if the Nickel Plating is much less than 0.0005" thick the ammonia gas succeeds in penetrating to a certain extent. We think that this is worth trying in the works, and would be a more convenient method of protection than coating with Tin and Pastes. Hl. HC | ||