Etching solution for revealing boundary between welding melted portion and heat affected portion and Inspection method using the etching solution

摘要

The present invention relates to an etching solution for revealing a boundary between welding melted portion and heat-affected zone, and a method of inspecting welding end using the etching solution. The etching solution, which is applied to the welding end including the melted portion and the heat-affected zone to allow defect positions within the welding end and defect-related items to be exhibited by vividly revealing the boundary between the melted portion and the heat-affected zone, comprises: natal; and sodium dodecylbenzenesulfonate which is mixed at a predetermined ratio with respect to nital. The method of the present invention not only can accurately confirm micro-cracks or defected portions included in the melted portion or the heat-affected zone by using the etching solution for vividly revealing the boundary between the melted portion and the heat-affected zone, but also can improve reliability of material analysis by minimizing hardness measurement errors.