1. 3) W. L. Clark, V. M. Romero and J. C. Denko: CORROSION/'77, NACE, Paper No. 180 (1977).
2. 5) W. L. Clark and D. C. Carlson: Material Performance, 19, 16 (1980).
3. 10) W. L. Clarke and G. M. Gordon: Corrosion, 29, 1 (1973).
4. 11) JIS Z 2371.
5. 13) S. Pednekar and S. Smialowska, CORROSION/'80, NACE, Paper No. 191 (1980).