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Effect of velocity and elevated temperature on pitting of Al 6013-20SiCp composite in 3·5 wt-%NaCl

Abstract This paper presents new data on the effect of temperature and velocity on the pitting potential Ep, corrosion potential Ecorr, and pitting morphology of O, F, and T4 tempers of alloy 6013-20SiCp in 3·5 wt-%NaCl in the temperature range 30–130°C and at velocities of 0·5–1·0 m S−1. The pitting potential of tempers T4 and O tended to increase with increasing temperature and flow velocity, but the pitting potential of temper F showed the opposite behaviour. Temper T4 of the alloy showed the best resistance to pitting. Alloy 6013-20SiCp in temper T4 is therefore considered to be suitable for application in chloride containing environments.