Abstract: The invention provides a surface conditioner which can prevent an aluminum alloy from stray current corrosion in chemical conversion treatment and reduce the difference between contact and noncontact areas in conversion coating build-up on an aluminum alloy and which enables the formation of excellent chemical conversion coatings on various metal materials and a surface conditioner which can prevent metal from rusting after surface conditioning and is excellent in dispersion stability in a treating bath. A surface conditioner to be applied prior to the phosphating of metal which contains (A) zinc phosphate particles having D50 of 3 ?m or below, (B) a water-soluble organic polymer, and (C) a layer clay mineral and has a pH of 3 to 12, characterized by further containing as the function imparting agent (D) a di- or tri-valent metal nitrite, zinc oxide and/or sodium hydroxide, or a nonionic or anionic surfactant.

Abstract: A surface conditioner contains zinc phosphate particles of D50 of 3 ?m or less and has a pH of 3 to 12, and also contains at least one of (1) carboxylate group-containing copolymers obtained by copolymerizing a monomer composition containing at least one species selected from acrylic acid, maleic acid, maleic anhydride, itaconic acid and itaconic anhydride in an amount less than 50% by weight and at least one species selected from the group consisting of a sulfonic acid monomer, styrene, olefin monomers, amino group-containing monomers and certain polyoxyalkylene derivatives, (2) certain polyamino acids, and (3) certain phosphate esters.

Abstract: The invention provides a surface conditioner which can prevent an aluminum alloy from stray current corrosion in chemical conversion treatment and reduce the difference between contact and noncontact areas in conversion coating build-up on an aluminum alloy and which enables the formation of excellent chemical conversion coatings on various metal materials and a surface conditioner which can prevent metal from rusting after surface conditioning and is excellent in dispersion stability in a treating bath. A surface conditioner to be applied prior to the phosphating of metal which contains (A) zinc phosphate particles having D50 of 3 ?m or below, (B) a water-soluble organic polymer, and (C) a layer clay mineral and has a pH of 3 to 12, characterized by further containing as the function imparting agent (D) a di- or tri-valent metal nitrite, zinc oxide and/or sodium hydroxide, or a nonionic or anionic surfactant.

Abstract: A concentrated solution (liquid concentrate) for preparing a surface conditioner, a surface conditioner (a treatment solution for preparing a surface), which have the excellent stability of dispersion and a method of a surface conditioning using this surface conditioner are provided. The concentrated solution for preparing a surface conditioner contains zinc phosphate particles and has a pH of 3 to 12. The zinc phosphate particles are of D50 3 ?m or less and the concentrated solution for preparing a surface conditioner contains a laminar clay mineral.

Abstract: A method for surface treatment of aluminum alloy to form a uniform and dense zinc phosphate coating, which has excellent corrosion resistance properties on the surface of the aluminum alloy. The method includes steps of surface adjusting the surface of the aluminum alloy by a surface adjustor containing a predetermined volume of zinc phosphate particles, copolymer containing carboxylic acid group, and natural hectorite and/or synthetic hectorite respectively, and chemical conversion treating the surface of the resultant aluminum alloy by a zinc phosphate treating agent containing a predetermined volume of chelating agent that can chelate bond with iron ion.

Abstract: A surface conditioner contains zinc phosphate particles of D50 of 3 ?m or less and has a pH of 3 to 12, and also contains at least one of (1) carboxylate group-containing copolymers obtained by copolymerizing a monomer composition containing at least one species selected from acrylic acid, maleic acid, maleic anhydride, itaconic acid and itaconic anhydride in an amount less than 50% by weight and at least one species selected from the group consisting of a sulfonic acid monomer, styrene, olefin monomers, amino group-containing monomers and certain polyoxyalkylene derivatives, (2) certain polyamino acids, and (3) certain phosphate esters.

Abstract: A concentrated solution (liquid concentrate) for preparing a surface conditioner, a surface conditioner (a treatment solution for preparing a surface), which have the excellent stability of dispersion and a method of a surface conditioning using this surface conditioner are provided. The concentrated solution for preparing a surface conditioner contains zinc phosphate particles and has a pH of 3 to 12. The zinc phosphate particles are of D50 3 ?m or less and the concentrated solution for preparing a surface conditioner contains a laminar clay mineral.

Abstract: A zinc phosphate-containing surface conditioning agent to be used for surface conditioning as pretreatment for zinc phosphate conversion coating of a metallic material, which contains from 500 to 20,000 ppm of zinc phosphate and which has a pH of from 3 to 11, wherein said zinc phosphate has an average particle size of at most 3 &mgr;m and D90 of at most 4 &mgr;m.