http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Masatoshi, Sakairi,Kazuma, Itabashi,Hideaki, Takahashi 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.6
Analysis of abrupt destroyed of passive oxide films on Al - Zn alloy layer coated on steel and its repairis important to understand the localized corrosion of steels. In the present investigation, anodic oxide films formed on Al - Zn coated steel specimens were removed by photon rupture method (one pulse of focused pulsed Nd - YAG laser beam irradiation) at a constant potential in sodium borate solutions, pH = 9.2, with / without chloride ions to monitor the current transient. Irradiation with a pulsed laser in solutions causes abrupt removal of the anodic oxide film on the specimen at the laser-irradiated area. Without chloride ions, oxide films were reformed in the sodium borate solution at - 0.5 to 1 V after removal of the anodic oxide film. However, in chloride ions containing solutions, pitting corrosion of Zn - 55 mass % Al coated layers occurs at high potentials, while film reformation occurs at low potentials. It was also found that chloride ions enhance dissolution of aluminum and zinc at the very initial period after laser irradiation.