The present invention discloses a method and a composition for removing metal sulfide scale present on the surface of a metal, said method comprising: providing a liquid composition comprising: a chelating agent and a counterion component selected from the group consisting of: sodium gluconate; gluconic acid; tetrasodium EDTA; EDTA; propylenediaminetetraacetic acid (PDTA); nitrilotriacetic acid (NTA); N-(2-hydroxyethyl) ethylenediaminetriacetic acid (HEDTA); diethylenetriaminepentaacetic acid (DTPA); hydroxyethyliminodiacetic acid (HEIDA); cyclohexylenediaminetetraacetic acid (CDTA); diphenylaminesulfonic acid (DPAS); ethylenediaminedi(o-hydroxyphenylacetic) acid (EDDHA); glucoheptonic acid; gluconic acid; oxalic acid; malonic acid; succinic acid; glutaric acid; adipic acid; pimelic acid; suberic acid; azelaic acid; sebacic acid; phthalic acid; terephthalic acid; aconitic acid; carballylic acid; trimesic acid; isocitric acid; citric acid; L-glutamic acid-N,N-diacetic acid (GLDA); salts thereof; and mixtures thereof; and an aldehyde; and water exposing a surface contaminated with said metal sulfide scale to the liquid composition; allowing sufficient time of exposure to remove said metal sulfide scale from the contaminated surface and sequestration of the sulfur ions from solution.

The invention relates to the field of removing various types of deposits from a surface, specifically to means for cleaning metallic and ceramic surfaces of industrial equipment, and can be used for removing deposits, such as oxides of metals (iron, chromium, nickel, etc.), carbonate and salt deposits, asphaltene-resin-paraffin deposits and deposits of a petroleum nature, and deposits of an organic and biological deposits. The proposed solution for removing various types of deposits contains hydrogen peroxide, complexone, an anti-foaming agent, water-soluble calixarene and water in the following ratio: hydrogen peroxide, a catalyst for decomposing peroxide compounds, an antifoaming agent, complexone, water-soluble calixarene and water in the following quantitative ratio: 2-35% by mass of hydrogen peroxide; 2-20% by mass of a catalyst for decomposing peroxide compounds; 3-10% by mass of complexone; 0.1-5% by mass of surface-active agent; 0.01%-1.0% by mass of anti-foaming agent; 0.01-1% by mass of water-soluble calixarene, with the remainder being water. The technical result is an increase in the effectiveness of action of a solution (degree of cleaning) for cleaning surfaces soiled with deposits having a high content of organic substances, while simultaneously extending the field of use of said solution.

Provided is a faucet fixture to which antifouling functionality is imparted without causing localized corrosion. The present invention is a faucet fixture comprising a metal base material and a plating layer partially formed on the surface of the metal base material. The metal base material contains at least one metal element species selected from the group consisting of copper, zinc, and tin. The plating layer contains at least one metal element species selected from the group consisting of chromium and nickel. An organic layer is further provided on the plating layer, with a passive layer present on the surface of the plating layer being interposed therebetween. The organic layer is bonded to the passive layer via the bonding of a metal element (M), which constitutes the passive layer, and a phosphorus atom (P) in at least one type of group (X) selected from the group consisting of phosphonate groups, phosphate groups, and phosphinate groups, with an oxygen atom (O) interposed therebetween (M-OP bond). Group X is bonded to a group R (wherein R is a hydrocarbon group, or a group comprising an atom other than carbon at one or two locations within a hydrocarbon group). The phosphorus atom concentration in the portion of the surface of the metal base material on which the plating layer is not formed is lower than the phosphorus atom concentration in the organic layer provided on the plating layer.

A magnesium alloy/resin composite structure including a magnesium alloy member and a resin member integrated to the magnesium alloy member and made of a thermoplastic resin composition, in which the magnesium alloy member surface to which the resin member is not integrated is coated with a layer including a manganese atom, an oxygen atom, and a sulfur atom.

A corrosion resistant pretreatment composition for coating a metal substrate is provided. The composition comprises an aqueous carrier, one or more Group IA metal ions, wherein at least one of the Group 1A metal ions comprises a lithium compound, a hydroxide; and a phosphate or a halide. A process for treating a metal substrate with a lithium based coating is also provided, as well as a process for treating a metal substrate with a non-chrome conversion coating process.

A corrosion resistant pretreatment composition for coating a metal substrate is provided. The composition comprises an aqueous carrier, one or more Group IA metal ions, wherein at least one of the Group 1A metal ions comprises a lithium compound, a hydroxide; and a phosphate or a halide. A process for treating a metal substrate with a lithium based coating is also provided, as well as a process for treating a metal substrate with a non-chrome conversion coating process.

A method of removing a ceramic coating from a ceramic coated metallic article without damaging the metallic bond coating, the metallic article having a first and second portions, each of the portions comprising a metallic bond coating and a ceramic coating on the metallic bond coating, the ceramic coating on the second portion being less porous than the ceramic coating on the first portion. The method comprises the steps of a) immersing the ceramic coated metallic article in a caustic solution; b) maintaining the ceramic coated metallic article in the caustic solution at atmospheric pressure for a predetermined time period and at a predetermined temperature; c) removing the ceramic coated metallic article from the caustic solution; d) rinsing the ceramic coated metallic article in water at ambient temperature; e) water jet blasting the first portion of the metallic article to remove the ceramic coating; and f) water jet blasting the second portion of the metallic article to remove the ceramic coating.

A method of removing a ceramic coating from a ceramic coated metallic article without damaging the metallic bond coating, the metallic article having a first and second portions, each of the portions comprising a metallic bond coating and a ceramic coating on the metallic bond coating, the ceramic coating on the second portion being less porous than the ceramic coating on the first portion. The method comprises the steps of a) immersing the ceramic coated metallic article in a caustic solution; b) maintaining the ceramic coated metallic article in the caustic solution at atmospheric pressure for a predetermined time period and at a predetermined temperature; c) removing the ceramic coated metallic article from the caustic solution; d) rinsing the ceramic coated metallic article in water at ambient temperature; e) water jet blasting the first portion of the metallic article to remove the ceramic coating; and f) water jet blasting the second portion of the metallic article to remove the ceramic coating.

A metal cleanser composition includes: (A) at least one carboxylic acid compound selected from the group consisting of an aliphatic monocarboxylic acid, a polycarboxylic acid, and a neutral salts thereof; (B) a specific oxyalkylene group-containing compound; and (C) at least one compound selected from the group consisting of a specific organic phosphonic acid and a salt thereof, and a specific nitrogen-containing heterocycle-containing compound.

The present invention relates to a method of manufacturing a metal-polymer resin bonded body, including: degreasing metal using a degreasing solution; etching the metal using an etching solution; electrolyzing the metal using an electrolyte solution; and performing a polymer resin injection to bond a polymer resin to the metal, wherein the electrolyte solution includes a compound containing distilled water, oxalic acid, sulfuric acid, and carboxylic acid.