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).
Table detailing the results of radiator corrosion experiments on different materials.
| Identifier | ExFiles\Box 27a\3\ Scan053 | |
| Date | 16th August 1929 | |
| (cont.) RESULTS OF RADIATOR CORROSION EXPERIMENTS. Test No. Depth of Sediment on vessel bottom. Condition of Materials. Cast Iron. Aluminium. Radiator Tubes. 15 -------- Fairly good except Good. Heavy deposit at water at water line line. Tendency to pit under scum. Apparent local dezincification. 16 -------- -------- Scummed. As 15 but much less deposit. 17 Traces only. -------- -------- -------- 18 Heavy aluminium hydroxide. -------- -------- -------- 19 -------- -------- -------- Greenish grey coher- ent coat 20 1/16" Fair. -------- -------- 21 Only Trace iron hydroxide. Rather rusty. Good Similar to 19. 22 ditto Slightly worse Slightly scummed Similar to 19, but than 21. not noticeably not quite so smooth. corroded. 23 Trace iron hydroxide. Better. Badly spot Brighter. corroded. 24 More aluminium hydroxide. -------- -------- Tubes seem dirtier but not corroded. 25 -------- Generally worse than 17. 26 -------- Generally better than 18. 27 White precipitate. Generally worse than 26. 28. -------- As 27. | ||