Abstract: A hydrophilic surface treatment agent for an aluminum-containing metallic heat exchanger, which is obtained by mixing: a water-soluble resin (A) having at least one or more functional groups of an amide group, a hydroxyl group, and a carboxyl group, or a water-soluble resin (A) including, in a skeleton thereof, an amide linkage; colloidal silica (B); organo alkoxy silane and/or a hydrolysate thereof (C); a cross-linking agent (D) capable of forming cross-linkage with the water-soluble resin (A); and water (E), wherein the ratio {(B)+(C)}/{(A)+(B)+(C)+(D)} is 0.1 to 0.5 in terms of solid content ratio (mass ratio), and the ratio (C)/(B) is 0.5 to 4.0 in terms of solid content ratio (mass ratio).

Abstract: A hydrophilic surface treatment agent for an aluminum-containing metallic heat exchanger, which is obtained by mixing: a water-soluble resin (A) having at least one or more functional groups of an amide group, a hydroxyl group, and a carboxyl group, or a water-soluble resin (A) including, in a skeleton thereof, an amide linkage; colloidal silica (B); organo alkoxy silane and/or a hydrolysate thereof (C); a cross-linking agent (D) capable of forming cross-linkage with the water-soluble resin (A); and water (E), wherein the ratio {(B)+(C)}/{(A)+(B)+(C)+(D)} is 0.1 to 0.5 in terms of solid content ratio (mass ratio), and the ratio (C)/(B) is 0.5 to 4.0 in terms of solid content ratio (mass ratio).

Abstract: A surface treatment solution for autodeposition coating treatment of a metallic material, which is an aqueous solution comprising at least one tannin, at least one crosslinking agent having a crosslinking group capable of thermosetting reaction with a phenolic hydroxyl group and/or a phenolic nucleus, ferric ions, soluble type elemental fluorine, and an oxidizing agent, wherein the solids mass concentration ratio of the tannin to the crosslinking agent is in the range of from 1:1 to 1:10, the molar concentration of the soluble type elemental fluorine is at least 3-fold the molar concentration of the ferric ions, and the pH of the solution is from 2 to 6.

Abstract: A surface treatment solution for autodeposition coating treatment of a metallic material, which is an aqueous solution comprising at least one tannin, at least one crosslinking agent having a crosslinking group capable of thermosetting reaction with a phenolic hydroxyl group and/or a phenolic nucleus, ferric ions, soluble type elemental fluorine, and an oxidizing agent, wherein the solids mass concentration ratio of the tannin to the crosslinking agent is in the range of from 1:1 to 1:10, the molar concentration of the soluble type elemental fluorine is at least 3-fold the molar concentration of the ferric ions, and the pH of the solution is from 2 to 6.

Abstract: A composition for surface treatment of aluminium, aluminum alloys, magnesium or magnesium alloys and the treating solutions being diluted to the desired concentration are defined. The composition contains (1) compound A containing at least one metal element selected from the group consisting of Hf(IV), Ti(IV) and Zr(IV), (2) a fluorine-containing compound of sufficient amount to make fluorine exist in the composition in an amount of at least 5 times the molarity of the total molarity of the metal contained in the above-mentioned compound A, (3) at least one metal ion B selected from the group of alkaline earth metals, (4) at least one metal ion C selected from the group consisting of Al, Zn, Mg, Mn and Cu, and (5) nitric ion and the mol concentration of compound A is 0.1-50 mmol/L as the metal element of Hf(IV), Ti(IV) and Zr(IV). A metal treated with the treating method of the present invention solution has an excellent resistance to various corrosive environments.

Abstract: A metal material having a coating formed by a surface treatment on the surface of the metal material is provided. The coating has an excellent corrosion resistance with or without a further coating that is equivalent or superior to the prior art coating formed by zinc phosphate treatment or chromate treatment, is free from sludge formation or environmentally harmful components, and is formed by using a component capable of deposition with a simple method.

Abstract: The present invention is the method for surface treatment of a metal material containing iron and/or zinc, containing component (A) and component (B); where (A) is a compound containing at least one metal element selected from the group consisting of Ti, Zr, Hf and Si, (B) is a compound containing fluorine as a supplying source of HF, wherein the ratio K=A/B between the total mole weight A of metal elements of Ti, Zr, Hf and Si in the compound of component (A) and the mole weight B which when the total fluorine atoms in the fluorine-containing compound of component (B) is converted to HF is within the range of 0.06?K?0.18, and the concentration of component (A) indicated by the total mole concentration of metal elements of Ti, Zr, Hf and Si is within the region of 0.05 to 100 m mol/L. To the treating solution for surface treatment, at least one compound containing at least one metal element selected from the group consisting of Ag, Al, Cu, Fe, Mn, Mg, Ni, Co and Zn can be blended.

Abstract: A metal material having a coating formed by a surface treatment on the surface of the metal material is provided. The coating has an excellent corrosion resistance with or without further coating that is equivalent or superior to the prior art coating formed by zinc phosphate treatment or chromate treatment, is free from sludge formation or environmentally harmful components, and is formed by using a component capable of deposition with a simple method.

Abstract: Treating solution for surface treatment of metal to treat one metal material selected from the group consisting of ferriferous material, zinciferous material, aluminiferous material and magnesiferous material or to treat two or more metal materials selected from the group consisting of ferriferous material, zinciferous material, aluminiferous material and magnesiferous material at the same time, wherein the aqueous surface treating solution contains from 5 to 5000 ppm of at least one compound selected from the group consisting of zirconium compound and titanium compound by the metal element, and from 0.1 to 100 ppm of free fluorine ion, further the pH of the treating solution is from 2 to 6. To the treating solution, calcium compound, magnesium compound, strontium compound, nitric acid group, oxygen acid and/or salt of oxygen acid, polymer compound and surface active agent can be added.

Abstract: A composition for surface treatment of aluminium, aluminum alloy, magnesium or magnesium alloy and the treating solutions being diluted to the desired concentration are defined. A said composition of this invention containing (1) compound A containing at least one metal element selected from the group consisting of Hf(IV), Ti(IV) and Zr(IV), (2) fluorine containing compound of sufficient amount to make fluorine existed in the composition at least by 5 times of molarity to the total molarity of metal contained in above mentioned compound A, (3) at least one metal ion B selected from the group of alkaline earth metals, (4) at least one metal ion C selected from the group consisting of Al, Zn, Mg, Mn and Cu, and (5) nitric ion and the mol concentration of compound A is 0.1-50 mmol/L as metal element of Hf(IV), Ti(IV) and Zr(IV). The metal treated with the treating method applying the present invention solution has excellent resistance to various corrosive environments.

Abstract: The present invention is the method for surface treatment of a metal material containing iron and/or zinc, comprising component (A) and component (B);

Abstract: A metal surface on which a phosphate conversion coating is to be formed and which has been surface conditioned by contact with a liquid surface conditioner composition that contains dispersed fine particles of solid phosphate of at least one divalent or trivalent cations type and an adhesion promoting agent. After such conditioning, a very high quality conversion coating can be formed on the surface by contact with a nickel-free liquid phosphating composition that contains at least acid, zinc cations, and phosphate anions and optionally and preferably also contains other materials.

Abstract: A metallic sheet for motor vehicles which is excellent press forming property and chemical layer generation property, and a process for producing the sheet. The treating chemicals apply to a metal surface consists of (A) particles of phosphate of metal selected from Zn, Fe, Mn, Ni, Co, Ca, Mg and Al, the average size of the particles are 3 &mgr;m or smaller, (B) a dispersing agent, and water. It is applied to a metal surface and then dried. Dispersing agent (B) include orthophosphoric acid, polyphosphoric acid, and organic phosphonic acid compounds. (B) also include polymer formed from a monomer represented by the chemical formula(1). Further more, monosaccharides, polysaccharaides or derivatives of vinylacetate may also be used as (B). It is applied to the metal surface so as to form a film in an amount of 0.05 to 3 g/m2 on a dried basis.

Abstract: A highly effective and storage stable conditioning treatment for metal surfaces prior to phosphating them is a suspension in water containing solid miorosize particles of at least one phosphate of a divalent or trivalent metal and an accelerant selected from the group consisting of sacoharides and their derivatives thereof, orthophosphoric acid, condensed phosphoric acids, organophosphonic acids, and polymers of vinyl acetate and/or carboxylic acid. The surface conditioning liquid composition is used simply by effecting contact between the metal and the liquid composition, and can also be used to simultaneously carry out degreasing, particularly when the conditioning liquid also contains nonionic or anionic surfactant.

Abstract: A high quality lubricant carrier for lubrication in cold plastic working of iron and steel is provided by a process in which the surfaces of objects to be worked are first treated with a surface conditioning liquid composition that contains dispersed fine particles of at least one of a Jernstedt salt, zinc phosphate, zinc calcium phosphate, and calcium phosphate, and is then treated by a phosphatizing solution that contains calcium cations.

Abstract: A pretreatment before phosphating conversion coating is effected by contacting a metal substrate to be coated with a pretreatment composition that has a pH from 4 to 13 and contains dispersed fine particle size alkali metal or ammonium salts and divalent or trivalent metal phosphates. The conditioning achieved is as good as with conventional Jernstedt salts and the pretreatment compositions according to the invention are more storage stable.