SCALE REMOVER AND MANUFACTURING METHOD OF METAL MATERIAL

• Main Authors: KIKUCHI KENTO, ISHITANI MASAMICHI, ASADA TERUAKI, UENO SHINYUKI, SHIGENAGA TSUTOMU
• Format: Patent
• Language: English; Japanese
• Published: 06.07.2022
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a scale remover which can remove scale while keeping plating film.SOLUTION: A scale remover contains a chelating agent, an organic acid, a fluorochemical and a surfactant. The chelating agent contains an aminocarboxylic acid type chelating agent. The aminocarboxylic acid type chelating agent has equal to or more than 2 carboxyalkyl groups binding to nitrogen atom in the molecule. The carboxyalkyl group is structured by linear alkylene groups. Equal to or more than 2 of the carboxyalkyl group are carboxymethyl groups.SELECTED DRAWING: Figure 1B 【課題】メッキ被膜を維持しながらスケールを除去できるスケール除去剤を提供する。【解決手段】キレート剤と、有機酸と、フッ素化合物と、界面活性剤と、を含み、前記キレート剤は、アミノカルボン酸型キレート剤を含み、前記アミノカルボン酸型キレート剤は、分子内に、窒素原子に結合する２以上のカルボキシアルキル基を有し、前記カルボキシアルキル基は、直鎖のアルキレン基により構成されており、前記カルボキシアルキル基の２以上は、カルボキシメチル基である、スケール除去剤。【選択図】図１Ｂ