Abstract
The corrosion characteristics of polycrystalline samples of Ti3SiC2, fabricated by two different powder production techniques, namely hot isostatic pressing (HIP) and hot pressing (HP), were investigated electrochemically by potentiodynamic testing. The corrosion behaviour of this material was studied in dilute HCl electrolytes. The effects of solution molarity and production technique were studied. The corrosion rate of HIP Ti3SiC2 was strongly affected by HCl concentration and the degree of attack reached a maximum at 2M HCl, which was the highest concentration used. Furthermore, HP samples showed less corrosion resistance to HCl than HIP samples. This is attributed to the finer grain size produced by HP. The corrosion rates of Ti3SiC2 and Hastelloy C are of the same order, whereas that of carbon steel is greater than that of HIP Ti3 SiC2 by ∼1000 times.
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