Cover: Hydrogen blistering, which was induced by the interaction of galvanic corrosion and crevice corrosion within the 0.5mm gap between titanium tube and carbon steel tube sheet, occurred at 35∼40°C on the outside wall of the tube used in the RCW (recirculating cooling water) heat exchanger of Qinshan Nuclear Power Plant in China. Afterwards, the tube wall was bulged inwards to the inside wall, and then localizedly thinned by oriented eddy erosion from the seawater containing sediment particles inside the tube until being ruptured.

More detailed information can be found in: Z.-G. Yang, Y. Gong, J.-Z. Yuan, Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant. Part I: Electrochemical corrosion, Materials and Corrosion 2012, 63, page 7.