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Cover:
Local SEM morphologies of 304SS with different machined roughness after an immersion test: (a) and (b) Ra3.2, (c) and (d) Ra6.0. Comparing Figures (a) and (c), it shows that the number of small pits decreases with increasing machined surface roughness. Figures (b) and (d) show that the pits initiated mainly on both sides of the peak ribs and rarely in the valleys.
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The relationship between specimens with different machined surface roughness and pitting resistance was explored using the critical pitting temperature (CPT), critical pitting potential (Ep), and FeCl3 pitting immersion tests. Compared with the arithmetic mean deviation of the surface contour (Ra), the depth–width ratio could characterize the mathematical relationship between the machined surface...