(EN)
To provide a method of hexavalent-chromium extraction by which hexavalent chromium, which is harmful, remaining on or in a chromium deposit or chromate coating film can be extracted without fail at low cost without the need of a special expensive apparatus to thereby prevent hexavalent chromium from dissolving away from the material treated. Thus, parts having residual hexavalent chromium can be made to be safely used or discarded and can be prevented from causing environmental pollution or influencing the human body. The method, which is for extracting hexavalent chromium remaining in a material (3) to be treated, comprises bringing the material (3) having a coating film containing residual hexavalent chromium into contact with a reducing agent (2) in a liquid or finely particulate form to thereby extract hexavalent chromium from the coating film.
(ZH) 本发明为提供一种六价铬的抽除方法，其不需要特殊且昂贵的设备，可将残存于镀铬或铬酸盐皮膜的表面或内部的六价铬有效且低廉地抽除，以阻止六价铬从被处理材料溶出，同时达到六价铬残存零件的安全使用或废弃，而防止对环境的污染或对人体的影响。解决问题的方法为一种残存于被处理材料(3)的六价铬的抽除方法。是使具有残存着前述六价铬的皮膜的被处理材料(3)与液状或微粒状的还原剂(2)接触。自前述皮膜抽除六价铬。
