1984 年 34 巻 6 号 p. 351-360
Galvanostatic anodic dissolution in chloride solutions at the current density of 0.11 mA/cm2 was proposed to estimate intergranular corrosion susceptibility of aluminum alloys and applied to such alloys as Al-Mn, Al-Zn-Mg, Al-Si and Al-Mg-Si. Preferential dissolution of grain boundary in the alloys after particular heat treatments was easily recognized in the test. The dissolution characteristics were agreed well with those of immersion corrosion test in tap water. Furthermore, intergranular corrosion mechanisms were discussed in terms of dissolution and anodic polarization characteristics.