A method for producing a heat exchanger having at least one cooling line with a lightweight metal base through which a water-based coolant can flow may include passivating a surface of the at least one cooling line, which is in contact with the coolant, before the at least one cooling line is filled with the coolant.

A method for producing a heat exchanger having at least one cooling line with a lightweight metal base through which a water-based coolant can flow may include passivating a surface of the at least one cooling line, which is in contact with the coolant, before the at least one cooling line is filled with the coolant.

A method for the manufacture of a substrate provided with a chromium VI-free and a cobalt-free passivation by the application of a first acidic passivation and a second alkaline passivation, containing a silane-modified and/or a siloxane modified silicate, with which an improved protection against corrosion is achieved, an aqueous, acidic composition for passivating and a passivated substrate, and a device for applying the passivation.

A method for the manufacture of a substrate provided with a chromium VI-free and a cobalt-free passivation by the application of a first acidic passivation and a second alkaline passivation, containing a silane-modified and/or a siloxane modified silicate, with which an improved protection against corrosion is achieved, an aqueous, acidic composition for passivating and a passivated substrate, and a device for applying the passivation.

Described herein is a simplified process for a pretreatment of metallic substrates for cold forming. Also described herein are a corresponding reactive lubricant, a metallic substrate which has been pretreated by the process, and a method of using the pretreated metallic substrate.

A production method of a member having a surface provided thereon with a chemical conversion coating includes a contacting step and a washing step. The contacting step causes a reactive-type chemical conversion treating acidic composition to contact with a base material having a metal-based surface thereby forming a chemical conversion coating on the metal-based surface of the base material. The washing step washes the base material having been subjected to the contacting step to obtain a member having a surface provided thereon with the chemical conversion coating. The reactive-type chemical conversion treating acidic composition contains a water-soluble trivalent chromium-containing substance, a water-soluble titanium-containing substance, and a carboxylic acid compound. The acidic composition is free from a water-soluble cobalt-containing substance.

A production method of a member having a surface provided thereon with a chemical conversion coating includes a contacting step and a washing step. The contacting step causes a reactive-type chemical conversion treating acidic composition to contact with a base material having a metal-based surface thereby forming a chemical conversion coating on the metal-based surface of the base material. The washing step washes the base material having been subjected to the contacting step to obtain a member having a surface provided thereon with the chemical conversion coating. The reactive-type chemical conversion treating acidic composition contains a water-soluble trivalent chromium-containing substance, a water-soluble titanium-containing substance, and a carboxylic acid compound. The acidic composition is free from a water-soluble cobalt-containing substance.

Disclosed are: a chemical conversion treatment solution for metal surfaces, which enables the formation of a chemical conversion coating film having excellent corrosion resistance and adhesion properties on metal base materials even though the solution does not contain chromium and fluorine, comprising at least one compound (A) selected from a water-soluble titanium compound and a water-soluble zirconium compound and an organic compound (B) that has multiple functional groups and can serve as a stabilizing agent, and which has a pH value of 2.0 to 6.5, wherein the content of the compound (A) is 0.1 to 10 mmol/L, and the content of the organic compound (B) is 2.5- to 10-fold larger than the content of the metal in the compound (A) by mole; and a method for treating the surface of a metal base material or a structure or body using the chemical conversion treatment solution for metal surfaces.

Disclosed are: a chemical conversion treatment solution for metal surfaces, which enables the formation of a chemical conversion coating film having excellent corrosion resistance and adhesion properties on metal base materials even though the solution does not contain chromium and fluorine, comprising at least one compound (A) selected from a water-soluble titanium compound and a water-soluble zirconium compound and an organic compound (B) that has multiple functional groups and can serve as a stabilizing agent, and which has a pH value of 2.0 to 6.5, wherein the content of the compound (A) is 0.1 to 10 mmol/L, and the content of the organic compound (B) is 2.5- to 10-fold larger than the content of the metal in the compound (A) by mole; and a method for treating the surface of a metal base material or a structure or body using the chemical conversion treatment solution for metal surfaces.

The invention relates to a method for modification of a biocompatible component. The method of the invention includes the steps of a) providing a biocompatible component at least partly covered by metallic oxide; and b) treating at least a part of the component, which part is covered by the metallic oxide, with an aqueous composition that includes oxalic acid; whereby a modified metallic oxide, is obtained. The invention also relates to a biocompatible component-including a substrate having a surface with a) a microstructure including pits separated by plateus and/or ridges; and b) a primary nanostructure being superimposed on the microstructure, the primary nanostructure having depressions arranged in a wave-like formation.