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Cyaniding is the process of | |
A. | dipping steel in cyanide bath [Wrong Answer] |
B. | reacting steel surface with cyanide salts [Wrong Answer] |
C. | adding carbon and nitrogen by heat treatment of steel to increase its surface hardness [Correct Answer] |
D. | obtaining cyanide salts [Wrong Answer] |
E. | making corrosion resistant steel. [Wrong Answer] |