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AssigneeDipsol Chemicals Co., Ltd.
InventorsManabu Inoue, Tadahiro Ohnuma, Tomitaka Yamamoto, Go Sato
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A composition for water-repellent treatment of zinc and zinc alloys which comprises a non-ionic polymeric compound having both hydrophilic and hydrophobic groups in the molecule, a polyacrylic acid salt and a balance of water. The composition can be used in a method for water-repellent treatment of zinc and zinc alloys which comprises the steps of immersing zinc or zinc alloys which has been subjected to a conversion treatment, then washing it with water and drying the same. The use of the water-soluble composition for water-repellent treatments permits considerable reduction of the contact area between the repellent-treated metal material and moisture which becomes a cause of corrosion under the corrosive environment in which water and oxygen coexist and this accordingly results in the improvement in the corrosion-resistance of the metal material.
A composition for water-repellent treatment of zinc and zinc alloys consisting essentially of 0.1 to 10% by weight of a non-ionic polymeric compound having both hydrophilic and hydrophobic groups in the molecule, a polyacrylic acid salt and a balance of water,
A composition for water-repellent treatment of zinc and zinc alloys consisting essentially of a non-ionic polymeric compound having both hydrophilic and hydrophobic groups in the molecule selected from the group consisting of polyvinyl alcohol, methyl cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl cellulose, a polyacrylic acid salt and a balance of water, the pH of the composition being 6 to 8.
Dependencies are inferred from the claim text.