淡水中におけるアルミニウム黄銅の応力腐食割れについて (III)

抄録

The stress corrosion cracking test by anodic polarization method for aluminum brass tubes was investigated in polluted cooling water. Specimens used in this experiment were aluminum brass tubes (BsTF 3) and tensile stress was applied to them in a model condenser.
Corrosion mediums were clean sea water, diluted sea water (A) containing 50% salinity of sea water, and diluted sea water (B) containing 1% salinity of sea water. Ammonium salt and hydrogen sulfide were added to each diluted sea water.
The results obtained in these experiments are summerized as follows;
(1) Anodic polarization method is suitable for accelerated stress corrosion cracking test for aluminum brass tube in practical conditions.
(2) Stress corrosion cracking of aluminum brass tubes in polluted cooling water is more severe in diluted sea water than in normal sea water.