Corrosion of Stainless Steels in Artificial Saliva with Different Fluoride Contents

The electrochemical corrosion behaviors of 316L and 304 stainless steels in artificial saliva with different fluoride contents were studied. The results showed that the corrosion rates of 316L and 304 stainless steels both increased at first stage and decreased in secondly stage when the contents of fluoride increased. Additionally, for 304 stainless steel, the corrosion rate also increased in third stage. The corrosion rates of 316L and 304 stainless steels both increased at first stage and decreased in secondly stage with the increese of time. The I-E curves of two kinds of steels had hysteresis loops when the concentration of fluoride was only or lower than 0.05 mol·L-1.