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).
Proposal for testing chromium-plated springs for hydrogen brittleness and comparative results.
| Identifier | ExFiles\Box 30\6\ Scan018 | |
| Date | 13th March 1928 | |
| RHC.{R. H. Coverley - Production Engineer} H1. C. Hs.{Lord Ernest Hives - Chair} X1360 BY17/G.13.3.28. In regard to the question of chromium plating springs, a further proposal has been put forward which appears to me to be a reasonable way of dealing with the matter. I want the Experimental Department to take a plate from an old spring, and cut half a dozen pieces from it to the following dimensions :- 12" long, 1" wide, and as nearly as possible 1/4" thick. (The actual thickness is not essential as long as all the test pieces are of one thickness.) All the parts will be cleaned and polished. Three of the parts will be chromium plated, the other three will be left in their initial state. After the parts have been completed H1. will give them a heat treatment to try and overcome any hydrogen brittleness which may have been set up. The six test pieces will then be tried out on the Upton Lewis for comparative results. We are handing to you herewith three flat spring plates made in chrome vanadium steel, which were sent to us by Messrs. Thos. Firths & Sons for another purpose. These will be satisfactory for the tests outlined above. When the test bars have been machined they should all be sent in to H1. for heat treatment, as the plates at present are in the untreated condition. BY.{R.W. Bailey - Chief Engineer} BH | ||