| 摘要 |
PURPOSE:To prevent crevice corrosion near the weld zone of a joint, in the stage of melting and welding the lapped parts of metallic plates to each other, by sandwiching a metal having lower potential than that of metals to be welded between the lapped parts. CONSTITUTION:Members 1, 1' to be welded, for example stainless steel plate of SUS304, are formed of a rising edge joint. A thin Al sheet or foil 2 is sandwiched in both risings. If the end edge parts are subjeced to TIG welding in said state, the thorough welding by fusion of the sheets 1, 1' and the foil 2 takes place, and the weld zone having a molten alloy part 3 is obtained. Here the remaining part of the foil 2 which did not melt acts as the sacrificial anode, and provides the effect of preventing the corrosion in the weld zone and near the same. |
