RUST REMOVING GEL AND RUST REMOVING METHOD

• Main Authors: NAGAO EIICHI, AKIBA EIJI, ARAKI TAKEO
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2018
• 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

PROBLEM TO BE SOLVED: To provide a rust removing gel that can be uniformly coated on metal products and can suppress liquid dripping caused by viscosity change, and to provide a rust removing method.SOLUTION: Provided is a rust removing gel having polyvinyl alcohol dissolved in an acidic water having a number of moles of sulfate ion of 70% or more of the total number of moles of contained anions, a pH of less than 3.0 and an oxidation-reduction potential of 450 mV or less, and in which the content of polyvinyl alcohol is 7.0 to 15.0 mass%.SELECTED DRAWING: None 【課題】金属製品へ均一に塗工することができ、粘度変化に起因する液だれを抑制することができるサビ落としジェルおよびサビ落とし方法の提供。【解決手段】硫酸イオンのモル数が、含有するアニオンの総モル数の７０％以上であり、ｐＨが３．０未満であり、かつ酸化還元電位が４５０ｍＶ以下である酸性水に、ポリビニルアルコールが溶解したサビ落としジェルであって、ポリビニルアルコールの含有量が７．０〜１５．０質量％である。【選択図】なし