1. 3) M. Takemoto, T. Shonohara, M. Shirai & T. Shinogaya: Materials Performance, 24, 26 (June 1985)
2. 6) L. Greenspan: J. Res. N. B. S., 81A, 89 (1977).
3. 7) M. Yajima, M. Arii: Materials Performance, 19, 17 (Dec. 1980).
4. 8) N. D. Tomashov: Theory of Corrosion and Protection of Metals, p. 367, Macmillan Co. (1966).