The non carcinogenic corrosion prevention additive, the goods null which possess the corrosion inhibiter solution, and the metal base substance which has corrosion prevention

摘要

PROBLEM TO BE SOLVED: To provide a corrosion inhibiting additive which is free of calcinogenicity and is effective in suppressing corrosion to metals.;SOLUTION: This non-calcinogenic corrosion inhibitor contains an anode corrosion inhibitive additive and a cathode corrosion inhibitive additive. The anode corrosion inhibitive additive is soluble in alkaline media and is, on the other hand, characterized by setting in the form of a reduced insoluble oxide under neutral and acidic reduction conditions, i.e., existing in the form of the insoluble oxide at pH (7) and below -600 mV with respect to an Ag/AgCl reference electrode and at pH 2 and below -300 mV with respect to the Ag/ AgCl reference electrode. The cathode corrosion inhibitive additive is soluble in acidic media and, on the other hand, equilibrates and changes in a direction where the corrosion inhibitor settles in the form of the insoluble oxide under neutral, alkaline and medium acidic condition, i.e., is the compound existing in the form of insoluble oxide at pH 7 and ≥-300 mV with respect to the potential of the Ag/AgCl reference electrode and at pH 12 and above -900 mV with respect to the potential of the Ag/AgCl reference electrode.;COPYRIGHT: (C)2002,JPO