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Sodium hypophosphite

About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.


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Patent
13 May 2009
TL;DR: In this paper, a chemical plating bath for high phosphorus plating of the Ni-P alloy onto the surface of 304 stainless steel is described, which improves the resistance of stainless steel to C1 corrosion and abrasion.
Abstract: The invention relates to chemical plating bath for the high phosphorus chemical plating of the Ni-P alloy onto the surface of 304 stainless steel, and belongs to the technical field of the bath technological recipe for chemical nickel plating onto the surface of stainless steel. The chemical plating bath consists of the following raw materials: nickel sulphate, sodium hypophosphite, lactic acid, citric acid, EDTA disodium, glycine, glycolic acid, a stabilizer of KIO3, sodium acetate and succinic acid. The high phosphorus coating plated by the chemical plating bath on the surface of stainless steel has excellent resistance to the acidic, alkaline and salt corrosion. In particular the resistance to C1 corrosion is better than that of the body of the 304 stainless steel. With respect to the mechanical property, the hardness of the coating is 450 to 550HV and is higher than that of the body of the 304 stainless steel. The chemical plating bath improves the resistance of stainless steel to C1 corrosion and abrasion, and expands the application field of stainless steel.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed a method of the chemical synthesis of reduced graphene oxide and used Sodium hypophosphite and sulfi te as reducing agents to obtain the reduced graphite oxide.
Abstract: The method of the chemical synthesis of reduced graphene oxide was developed. Sodium hypophosphite and sulfi te were used as reducing agents. The formation of reduced graphene oxide was confi rmed by several methods. Volt-ampere characteristics of electrodes based on reduced graphene oxide were investigated in an experimental model of an oxygen fuel cell with an alkaline electrolyte. Characteristics of oxygen electrodes based on reduced graphene oxide were stable over semiannual tests. The resulting reduced graphene oxide is a promising material for oxygen electrodes of chemical current sources.

5 citations

Patent
09 Jun 2010
TL;DR: In this article, a continuously self-catalyzed deposition chemical plating solution of tin and a using method thereof is presented. But the method is not suitable for the use in the case of high deposition rate, remarkable grain refinement, improvement on surface evenness of the clad layer and batch production stability.
Abstract: The invention discloses continuously self-catalyzed deposition chemical plating solution of tin and a using method thereof. Half-bright and silvery-white tin-copper alloy deposition layers are obtained on pure copper and a copper alloy substrate. In the chemical plating solution, stannous chloride serves as a main salt, thiourea serves as a main complexing agent, trisodium citrate serves as an auxiliary complexing agent, sodium hypophosphite serves as a reducing agent, disodium ethylene diamine tetraacetate serves as an antioxidant, a hydrochloric acid serves as a stabilizing agent, gelatin serves as a leveling agent and benzaldehyde serves as an auxiliary brightening agent. The using method comprises the following operating conditions that: the pH value of the plating solution is 0.8 to 2.0; the temperature is 80 to 90 DEG C; the loading capacity is 0.8 to 1.5 dm2/L; and the mechanical stirring speed is 50 to 100 rpm. The continuously self-catalyzed deposition chemical plating solution of the tin and the using method thereof have the advantages of capability of obtaining half-bright and silvery-while tin-copper alloy clad layers with different thicknesses by controlling chemical plating time, high deposition rate, remarkable grain refinement, improvement on surface evenness of the clad layer and batch production stability, secure interface combination, strong change resistance of the clad layer after being passivated, and broad application prospect in the products of deep hole elements, blind hole elements, difficult-to-handle miniature electronic components and parts, printed circuit boards PCBs and the like.

5 citations

Patent
14 May 1996
TL;DR: In this article, a nickel layer having 4μm thickness is deposited on the surface of SUS420J2 base material by using a nickel chloride bath, then, an outermost surface coating having a composition of Ni-W-Mo-P (wt. ratio is 69:20:6:5) and 22μm length is formed by using plating liq.
Abstract: PURPOSE: To produce a mold for glass formation excellent in releasing property and oxidation resistance and hardly causes scratch on a surface of glass. CONSTITUTION: A nickel layer having 4μm thickness is deposited on the surface of SUS420J2 base material by using a nickel chloride bath, then, an outermost surface coating having a composition of Ni-W-Mo-P (wt. ratio is 69:20:6:5) and 22μm thickness is formed by using a plating liq. consisting essentially of nickel sulfate, sodium tungstate, sodium molybdate, sodium citrate, sodium hypophosphite and phosphoric acid.

5 citations

Patent
03 Mar 2010
TL;DR: In this paper, a new method for preparing loaded and unloaded MoP by utilizing thermal decomposition of the mixed precursor of ammonium molybdate and ammonium hypophosphite at low temperature is presented.
Abstract: The invention provides a new method for preparing loaded and unloaded MoP by utilizing thermal decomposition of the mixed precursor of ammonium molybdate and ammonium hypophosphite at low temperature.The method comprises the steps of: taking ammonium molybdate as a Mo source, stirring and dissolving ammonium molybdate and ammonium hypophosphite in solution, and obtaining the mixed precursor by recrystallization, and conducting simple thermal decomposition on the precursor at low temperature, thus synthesizing the loaded and unloaded MoP. The method is characterized in that the adopted ammonium molybdate has larger solubility than sodium molybdate, thereby being more beneficial to preparing high loaded MoP catalyst with high loading quantity; ammonium hypophosphite is adopted as reductantby replacing sodium hypophosphite so as to avoid the introduction of foreign ions; the whole preparation process is simple, synthetic temperature is low and production period is short and flowing protective gas is not needed in the preparation process, the complex steps such as temperature raising of the program and the like are not needed except simple heat treatment at constant temperature; anddue to the better HDS and HDN activity, the catalyst can be widely used in the hydrotreating of oils.

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202315
202234
202125
202051
2019116
201890