94 results about "Phosphate conversion coating" patented technology

The invention discloses a non-oriented electric steel semi-organic phosphate insulating paint with good corrosion resistance. The semi-organic phosphate insulating paint comprises the following main components: water-soluble phosphate, tungstate, organic resin, water, a titanate coupling agent, an organic solvent and the like; and contents of the components of the insulating paint (parts by weight) based on 100 parts of the water-soluble phosphate by weight are as follows: 1-15 parts of the tungstate, 20-200 parts of the organic resin, 500-2000 parts of the water, 0.1-3 parts of the titanate coupling agent, 10-50 parts of the organic solvent and 0.1-3 parts of other paint addictives. The semi-organic phosphate insulating paint contains no harmful ingredients restricted by an EU directive RoHS, which can meet the requirements for environmental protection; and compared with the common phosphate coating, the coating of the semi-organic phosphate insulating paint has better corrosion resistance, good insulating property, good adhesiveness, good blanking property, good welding property, good heat resistance and the like, which can meet the requirements of electric motor and transformermanufacturers for application to the electric steel coating.

By including nitric acid and hydroxylamine in a manganese phosphating composition and controlling the ratio of nitric to phosphoric acids and the ratio of Total Acid to Free Acid within a specified range, satisfactory manganese phosphate conversion coatings can be obtained within a reasonable time at temperatures much lower than has previously been thought necessary for operating a manganese phosphating composition with no other metal cations (except possibly for iron).

The invention relates to an environment-friendly insulating coating solution used for non-oriented silicon steel and preparation and application thereof, in particular to a phosphate coating solution and preparation and application thereof, belonging to the technical field of preparation of a silicon steel insulating coating. Based on the total mass of the coating solution, the environment-friendly insulating coating solution used for non-oriented silicon steel comprises the components by the mass percentage of: 20 to 25 percent of aluminum dihydric phosphate solution, 10 to 15 percent of magnesium dihydrogen phosphate solution, 15 to 20 percent of ludox, 2 to 8 percent of boric acid and the balance of deionized water. The insulating coating prepared by using the environment-friendly insulating coating solution used for non-oriented silicon steel not only can guarantee that all the performances such as uniformity, insulating performance, adhesiveness, corrosion resistance, heat resistance, weldability and the like are excellent, but also totally solves the problem in environment protection caused by chromium.

According to an embodiment of the invention, an article of manufacture for use in a gas turbine engine is disclosed. The article comprises a part having a surface covered with a ceramic thermal barrier coating. The thermal barrier coating has an outer surface covered with a sacrificial phosphate coating, wherein the sacrificial phosphate coating reacts with contaminant compositions to prevent contaminant infiltration into the thermal barrier coating.

By including nitric acid and hydroxylamine in a manganese phosphating composition and controlling the ratio of nitric to phosphoric acids and the ratio of Total Acid to Free Acid within a specified range, satisfactory manganese phosphate conversion coatings can be obtained within a reasonable time at temperatures much lower than has previously been thought necessary for operating a manganese phosphating composition with no other metal cations (except possibly for iron).

Disclosed is a steel sheet for containers that maintains excellent corrosion resistance even when a surface treatment that replaces a chromate treatment has been conducted, and that has excellent film adhesion qualities and appearance. This steel plate for containers has, on at least one surface thereof, a chemical conversion coating including at least two coatings selected from a zirconium coating that contains zirconium and has a metal zirconium content of 0.1-9 mg / m2, a phosphate coating that contains phosphoric acid and has a phosphorous content of 0.1-8 mg / m2, and a phenolic resin coating that contains phenolic resin in an amount of 0.5-8 mg / m2 in terms of carbon, the percentage of the area of the surface of the chemical conversion coating layer having particles Of a prescribed size being 0.1-50%.

Provided are a phosphate coated stainless steel wire for cold heading and a self-drilling screw using the stainless steel wire. Since a phosphate coating is formed on a surface of the stainless steel wire, cold headability and clamping force can be significantly improved, and since outer appearance is improved, a post-process after a heading is not required.

The invention is directed to a combination of a conditioner bath and a calcium modified zinc phosphating solution optionally containing hydroxylamine which provide an improved phosphate coating on the surface of ferrous metal articles. In a preferred embodiment, the treatment process further comprises coating the workpiece with a second lubricant. The three treatments work together to provide finer grained phosphate coatings, longer life of the second lubricant bath and improved adherence of the second lubricant, as compared to a similar phosphating bath that is used alone or with a similar second lubricant.

The invention discloses a sealing treatment method for an aluminum alloy anode oxide film. The sealing treatment method for the aluminum alloy anode oxide film is high in sealing effect and high in timeliness. The sealing treatment method comprises the following steps of preparing soluble phosphate solution; uniformly brushing the soluble phosphate solution on the aluminum alloy anode oxide film; curing the soluble phosphate solution in air; performing heat treatment on the aluminum alloy anode oxide film for a period of time at the temperature of 150-350 DEG C; naturally cooling down the aluminum alloy anode oxide film after the aluminum alloy anode oxide film is subjected to heat treatment; uniformly brushing the prepared phosphate solution on the aluminum alloy anode oxide film again; curing the phosphate solution for a period of time in air; performing heat treatment on the aluminum alloy anode oxide film for a period of time at the temperature of 150-350 DEG C; and repeating the steps twice to eight times so as to form a compact phosphate coating on the surface of the aluminum alloy anode oxide film. By the phosphate coating, the corrosion resisting property, the wear resistance and the timeliness of the aluminum alloy anode oxide film can be improved obviously. The sealing treatment method for the aluminum alloy anode oxide film is suitable to be popularized and used in the technical field of sealing.