A method for manufacturing a laminated tinplate for packaging applications, the laminated tinplate including a tinplate sheet and a thermoplastic laminate layer that covers at least one side of the tinplate steel sheet, to a laminated tinplate produced thereby and use thereof in a process to produce containers for packaging purposes.

The present invention relates to metals or metal alloys comprising a protective silicate glass-like coating, and methods for coating the metals or metal alloys. The methods comprise removal of any existing oxide layer from the metal or metal alloy, formation of a new oxide layer on the metal or metal alloy using chemical passivation or exposure to a gaseous oxidising environment, coating the oxidised metal or metal alloy with an aqueous silicate solution, and curing the coating.

The present invention relates to metals or metal alloys comprising a protective silicate glass-like coating, and methods for coating the metals or metal alloys. The methods comprise removal of any existing oxide layer from the metal or metal alloy, formation of a new oxide layer on the metal or metal alloy using chemical passivation or exposure to a gaseous oxidising environment, coating the oxidised metal or metal alloy with an aqueous silicate solution, and curing the coating.

Disclosed herein is an aqueous composition having a pH value at 55° C. in the range from 5 to 9, containing at least two different amino organophosphonic acid derivatives of formula (I)

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where residues R independently of each other are CH.sub.2—PO(OR″).sub.2, residues R′ independently of each other are alkylene residues with 2 to 4 carbon atoms, residues R″ independently of each other are H, Na, K, Li or NH.sub.4; and n is an integer from 0 to 4; and where the at least two different amino organophosphonic acid derivatives differ in the value of n. Further disclosed herein is a concentrate to produce such compositions, a pickling method for pickling metallic substrates making use of the compositions, a coating method for coating metallic substrates including the pickling method and a method of using the compositions for pickling metallic substrates.

A grain-oriented electrical steel sheet has a steel sheet and an insulating coating which is formed on a surface of the steel sheet. In the insulating coating, a metal phosphate and a colloidal silica are contained, the colloidal silica is contained in an amount of 20 to 150 parts by mass with respect to 100 parts by mass of the metal phosphate, one or more kinds of fine particles selected from the group consisting of silicon carbide, silicon nitride, aluminum nitride, boron nitride, sialon, and cordierite are further contained in an amount of 0.5 to 7 parts by mass with respect to 100 parts by mass of the metal phosphate, an average particle size of the fine particles is 0.3 to 7.0 μm, crystallized ratio of the metal phosphate is 2% to 40%, and chromium is not contained.

Disclosed is a composite coating for eliminating pollution by chromium and VOCs from a source, the coating comprising a conversion film layer and a coating surface layer. The conversion film layer is made of a surface pretreatment liquid, and the surface pretreatment liquid comprises the following components: an organic compound A having an aromatic ring and at least two phenolic hydroxyl groups in the molecule thereof, or a hydrate thereof; an ionic compound B containing zirconium and/or titanium and fluorine; a mixed solution C containing manganese fluoride; and an inorganic salt D containing potassium ions or sodium ions. The coating surface layer is an FEVE-type fluorocarbon powder coating layer. Also disclosed is a preparation method for the described composite coating.

A method to treat the magnesium surface to manufacture the metallic assembly with the polymer and magnesium to have excellent bonding strength is disclosed.

As a method to treat the magnesium surface for the bonded coupling of the mixture of the polymer and magnesium, this is a method including, (a) an etching step, wherein the magnesium surface is treated with an acidic solution; (b) a first surface treatment step, wherein the magnesium surface is treated with ultrasonic waves; (c) a second surface treatment step, wherein the magnesium surface is treated with an acidic solution; (d) a first silane coupling processing step, wherein the magnesium surface is treated with ultrasonic waves; (e) a surface activation treatment step, wherein the magnesium surface is treated with acidic solution; and (f) a second silane coupling processing step, wherein the magnesium surface is treated with ultrasonic waves.

A method to treat the magnesium surface to manufacture the metallic assembly with the polymer and magnesium to have excellent bonding strength is disclosed.

As a method to treat the magnesium surface for the bonded coupling of the mixture of the polymer and magnesium, this is a method including, (a) an etching step, wherein the magnesium surface is treated with an acidic solution; (b) a first surface treatment step, wherein the magnesium surface is treated with ultrasonic waves; (c) a second surface treatment step, wherein the magnesium surface is treated with an acidic solution; (d) a first silane coupling processing step, wherein the magnesium surface is treated with ultrasonic waves; (e) a surface activation treatment step, wherein the magnesium surface is treated with acidic solution; and (f) a second silane coupling processing step, wherein the magnesium surface is treated with ultrasonic waves.

The present invention is directed towards an aqueous alkaline cleaner composition comprising: an iron cation, a molybdenum cation, a cobalt cation, or combinations thereof; and an alkaline component; wherein the pH of the aqueous alkaline composition is at least 10, and the aqueous alkaline composition includes no more than 50 ppm of phosphate. Also disclosed are treatment systems comprising an aqueous alkaline composition for treating at least a portion of a substrate, and a pretreatment composition for treating at least a portion of a substrate. Also disclosed are substrates treated according to the disclosed treatment systems.

The present invention is directed towards an aqueous alkaline cleaner composition comprising: an iron cation, a molybdenum cation, a cobalt cation, or combinations thereof; and an alkaline component; wherein the pH of the aqueous alkaline composition is at least 10, and the aqueous alkaline composition includes no more than 50 ppm of phosphate. Also disclosed are treatment systems comprising an aqueous alkaline composition for treating at least a portion of a substrate, and a pretreatment composition for treating at least a portion of a substrate. Also disclosed are substrates treated according to the disclosed treatment systems.