METHOD FOR EVALUATING CORROSION RESISTANCE OF STAINLESS STEEL PIPING

摘要

PROBLEM TO BE SOLVED: To evaluate the corrosion resistance of stainless steel piping by measuring a current being a corrosion cause. ;SOLUTION: Stainless steel pipings are mutually clamped by bolts through an insulating sheet, an insulating sleeve and an insulating washer to provide insulating flanges and the current flowing into the pipings is measured by the non-resistance ammeter connected across the insulating flanges is measured and the corrosion resistance of the stainless steel pipings is judged on the basis of the measured value. When the difference between the current values before and after the passage of water is taken, the current acting on macrocell corrosion is measured. A measure insulating and strengthening a pipe joint or a support part is taken corresponding to the current measured value and piping planning excellent in corrosion resistance can be performed.;COPYRIGHT: (C)1997,JPO