Abstract
The corrosion resistance, to the electrode potentials and its time-potential curves of α-or β-solid-solution binary titanium alloys in 20% hydrochloric acid solution have been measured. The effects of addition of some elements in high strength forging alloys on the corrosion resistance and to time-potential curves in hydrochloric, sulfuric and oxalic acid solutions of different concentration at various temperatures were also examined. The following results have been obtained. (1) The effect of addition of various elements to titanium on the anti-corrosive properties varies quite remarkably by the added elements. (2) Those elements of I and II series in the periodic chart were less effective. On the other hand the addition of such elements like platinium, palladium, zirconium and molybdenium improves the corrosion resistance fo the titanium alloys. (3) The electrode potentials of the alloys whose corrosion resistances are inferior drops more rapidly at a certain time. The potentials after the dropping reach the same value in every alloys. (4) The addition of chromium to high strength forging alloy improves its corrosion resistance to sulfuric acid solution.
