The present invention provides an anti-corrosion composition for a metal surface, especially of pre-stressing steel, the anti-corrosion composition being thixotropic and comprising an organic component which is an oil, fat or wax. The anti-corrosion composition of the invention is characterized in that it is translucent and also comprises an indicator which responds to corrosion of the metal surface by changing its absorption spectrum in the region of ultra-violet, visible or infra-red light, in particular with a colour change. Further provided in accordance with the invention are a metal structure bearing the anti-corrosion composition of the invention, an apparatus on the metal structure, and a method for checking the metal structure.

Conversion and passivation coatings and methods for metal surfaces such as steel and aluminum are disclosed. The coating compositions comprise an aqueous sol of cerium oxide and/or silica particles and a ureido silane compound. The methods of the invention comprise contacting the requisite metal surface with the coating composition.

Disclosed are petrolatum-like compositions that include metathesized unsaturated polyol esters. Also disclosed are emulsions that include metathesized unsaturated polyol esters. The petrolatum-like compositions may be used as substitutes for petroleum-based petrolatum. The emulsions may be water-in-oil or oil-in-water emulsions and may be suitable for a variety of end uses.

The present disclosure is directed to methods, systems and apparatuses for predictively selecting plant extracts for their inclusion in formulations to imparting anti-corrosion properties to coatings for aluminum, aluminum alloys, copper and copper alloys.

The present disclosure is directed to methods, systems and apparatuses for imparting anti-corrosion properties into coatings for aluminum, aluminum alloy, copper and copper alloys by preparing and applying corrosion inhibition formulations comprising plant extracts comprising anti-corrosion properties.

Provided is a bilayer composition for surface treatment of a steel plate and a surface-treated steel plate using same. The bilayer composition for surface treatment of a steel plate, comprising an undercoat coating composition including 1 to 12 wt % of a phenoxy resin, 0.001 to 1.0 wt % of colloidal silica, 0.001 to 1.0 wt % of a silane coupling agent, 0.1 to 1.0 wt % of a corrosion inhibitor, 0.001 to 1.0 wt % of a phosphoric acid compound as a long-term corrosion resistance improving agent, and a balance of water; and a topcoat coating composition including 0.1 to 5.0 wt % of an acrylic acid resin, 30 to 50 wt % of colloidal silica, 40 to 60 wt % of alkoxy silane, 5 to 15 wt % of an acrylate-based monomer, 0.01 to 1.00 wt % of an acidity control agent, and a balance of an organic solvent.

The present invention relates to a method for producing coatings on metal surfaces, wherein an optionally precoated metal surface has applied to it a coating material composition (K) which comprises a) at least one polyhydroxyl group-containing component (A), b) at least one component (B) having on average at least one free and/or blocked isocyanate group and having on average at least one hydrolyzable silane group of the formula (I)

N(XSiRx(OR)3-x)n(XSiRy(OR)3-y)m(I) c) and at least one phosphorus-containing catalyst (D) for the crosslinking of silane groups,
which comprises i. applying the coating material composition (K) to wheel rims, ii. 5 to 50 mol % of the isocyanate groups originally present in component (B) having undergone reaction to form silane groups of the formula (I), and iii. the phosphorus-containing catalyst (D) being selected from the group of phosphorus-containing acids and/or the partial esters of phosphorus-containing acids.

The present invention further provides the coatings obtainable by this method and also the use thereof.

A metal surface coating composition including a high-consistency material containing a lubricant base oil and an amide compound, and a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, wherein the ratio (a/b) of the number of amide groups (a) and the number of acidic groups (b) is within a range of 1.1 to 6.0:

##STR00001## where X.sup.1 to X.sup.7 represent an oxygen atom or a sulfur atom, R.sup.11 to R.sup.13 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms, and R.sup.14 to R.sup.16 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms.

The present invention provides a pigment/additive comprising discrete multivalent oxidation state (DiMVO) phenothiazine compounds having corrosion inhibiting properties. These novel DiMVO phenothiazines are useful in preparing waterborne primer coating formulations for application to metals and metal alloys and demonstrating corrosion inhibiting properties. Furthermore, such formulations are chromate-free and have reduced VOC content. Methods of preparing and using such compounds and waterborne formulations also are described.

The present invention relates to an aqueous coating composition (A) comprising at least one cathodically depositable binder (A1) and optionally at least one crosslinking agent (A2), for at least partly coating an electrically conductive substrate with an electrocoat material, where (A) comprises a total amount of at least 30 ppm of bismuth, based on the total weight of (A), and additionally at least one phosphorus-containing compound (P) blocked with at least one amine of the general formula (I), to the use of (A) for at least partly coating an electrically conductive substrate with an electrocoat material, to a corresponding coating method, and to an at least partly coated substrate obtainable by this method.