The invention discloses a multifunctional metal surface treatment solution which comprises the following components in percentage by mass: 30-60 percent of phosphoric acid, 5-10 percent of accelerator, 15-20 percent of derusting transforming agent, 3-5 percent of corrosion inhibitor, 1-2 percent of degreaser, 0.5-3 percent of passivator and 5-30 percent of water, wherein the accelerator is tartaric acid or/or citric acid, the derusting transforming agent is zinc phosphate or/and zinc nitrate or/and zinc oxide; the corrosion inhibitor is aluminium hydroxide or/and sodium nitrite, the degreaser is sodium alkylbenzenesulfonate or/and sodium fluoride; and the passivator is bichromate or/and ammonium molybdate or/and magnesium chloride. The multifunctional metal surface treatment solution has the advantages of scientific and reasonable formula, capability of removing rust, preventing rust and removing grease by being directly sprayed on the surface of metal, and also capability of replacing an anti-corrosive primer.

Multifunctional metal surface treatment solution

The invention relates to the technical field of passivation agents and in particular relates to a copper chromate-free passivation agent and an application method thereof. The copper chromate-free passivation agent comprises the following raw materials based on each liter of water: 0-15g of benzotriazole, 0-180g of organic phosphonic acid, 0-30g of organic carboxylic acid, 5-20g of an imidazoline inhibitor, 0-20g of phytic acid, 0-15g of absolute ethanol, 0-15g of cetyl trimethyl ammonium bromide and 1L of water, wherein the mass ratio of the benzotriazole to the absolute ethanol is 1 to 1; the organic phosphonic acid is glycine dimethyl phosphonate, hydroxy hexyl diphosphonic acid, 2-phosphate-1,2,4-tricarboxylic acid butane or hydroxy ethylidene diphosphonic acid; organic hydroxy acid is tartaric acid, citric acid or salicylic acid; the imidazoline inhibitor is oleate imidazoline, rosinyl imidazoline or thiourea imidazoline. The copper chromate-free passivation agent has the advantages of non-toxicity, no chromate, environmental friendliness and excellent salt fog resistance.

Copper chromate-free passivation agent and application method thereof

The invention provides a plate error prevention device and a working method thereof used for commissioning and ceasing state detection of a relay protection plate and an error prevention operation of the relay protection plate, and problems of error commission, error cease, missed commission, missed cease and the like of the plate are solved The plate error prevention device comprises an intelligent plate, a plate controller, a transmission adapter, a computer key and a computer management system A plate intelligent part detects commissioning and ceasing states of a plate commissioning and ceasing function part and transmits commissioning and ceasing state information to the plate controller through a communication circuit, and the plate controller uploads collected commissioning and ceasing state information of the plate to the computer management system When the plate is needed to be operated, the computer management system forms an operation order and sends the operation order to the computer key through the transmission adapter The computer is inserted into the corresponding plate controller The plate controller transmits operation information to the the plate needing to be operated An indicator light of the plate needing to be operated is on and operating the plate is prompted After the operation of the operation order is completed, the computer key is transmitted to the computer management system back

Plate error prevention device and working method thereof

Low-temperature single-component zinc series phosphating solution and preparation method thereof

The invention relates to environment-friendly derusting conditioning fluid for metal equipment of a flue-curing barn. By the environment-friendly derusting conditioning fluid, the technical problem of poor derusting effect or high cost and the like in the conventional deruster is solved. According to the key point of the technical scheme, the environment-friendly derusting conditioning fluid is prepared by mixing and stirring the following raw materials in part by weight: 50 to 70 parts of deionized water, 20 to 30 parts of orthophosphoric acid, 1 to 3 parts of zinc hydroxide, 2 to 4 parts of manganous dihydrogen phosphate, 0.5 to 1.5 parts of sodium tripolyphosphate, 1 to 3 parts of sulfosalicylic acid, 1 to 3 parts of sodium nitrite, 2 to 4 parts of boric acid, 0.5 to 1.5 parts of sodium molybdate and 0.5 to 1.5 parts of polyvinyl alcohol. By the environment-friendly derusting conditioning fluid, rust melting and rust proofing are completed at one time, so that the labor production efficiency is improved greatly, and the cost of conditioning rust is reduced. The environment-friendly derusting conditioning fluid can be widely applied to a surface treatment process for steel devices.

Environment-friendly derusting conditioning fluid for metal equipment of flue-curing barn

The invention relates to a site rust-removing and corrosion-preventing method for continuously carrying out the electric processing of a steel piece of an electric power system, which has good rust removing and corrosion preventing effect and comprises the steps of: a removing the dust and the rust on the corrosion part of the steel piece on site; b coating the rust corrosion part at least for once by utilizing the surface treating fluid integrating four functions of removing oil, removing rust, phosphatizing and passivizing after the step a; and c coating for at least once by utilizing corrosion-preventing paint after the coated surface treating fluid is completely dried, wherein the surface treating fluid is a water solution prepared according to the following components and the contents thereof; and each liter of the surface treating fluid contains 50 to 350ml of phosphoric acid (while the condensation is 85%), 5 to 25g of Zinc, 02 to 75g of phosphatizing reaction accelerant, 05 to 10g of oxidant, 10 to 40g of polyhydroxyl organic acid complexing agent, 1 to 5g of surfactant and the balance of water The method is suitable for the rust removing and the corrosion preventing of outdoor electric power equipment

Site rust-removing and corrosion-preventing method for steel piece of electric power system

The invention relates to a relay protection secondary pressure plate device for an electric power system. The relay protection secondary pressure plate device mainly comprises a pressure plate connecting column and a pressure plate column which are adjacently arranged, and a pressure plate main body formed by pressure plates connected between the pressure plate connecting column and the pressure plate column, wherein the pressure plate main body is placed on a pressure plate seat, a pressure plate cover body for covering the pressure plate main body is matched on the pressure plate seat, and an anti-malfunction locking body matched with a lock catch arranged on the pressure plate seat is arranged on the pressure plate cover body; an anti-malfunction locking code pairing frame with a lock code plate is arranged at the upper part of the pressure plate cover body, and an anti-malfunction locking head matched with the anti-malfunction locking body is arranged at one side of the pressure plate cover body; and the invention has simple structure and convenient and reliable use, can effectively prevent the incorrect manipulation accident of the secondary pressure plate in the electric power system, solves the problem the electric power system only has primary equipment for anti-malfunction and does not take reliable secondary anti-malfunction measures for long term, extends the application field of the anti-misoperation system of the microcomputer, improves the investment efficiency and especially provides assurance for safe operation of the electric network.

Secondary clamping board device for electrical power system relay protection

The utility model relates to a secondary pressure plate device for electric system relay protection, mainly comprising a pressure plate connecting column, a pressure plate column and a pressure plate body, wherein the pressure plate connecting column and the pressure plate column are adjacently arranged; and the pressure plate body is formed by a pressure plate which can connect the pressure plate connecting column and the pressure plate column together. The pressure plate body is arranged on a pressure plate seat. The pressure plate seat is provided with a pressure plate cover body which can cover the pressure plate body. The pressure plate cover is provided with an anti-misoperation lock body which is matched with a lock arranged on the pressure plate seat. The upper part of the pressure plate cover body is provided with an anti-misoperation lock code frame with a lock code plate. One side of the pressure plate cover body is provided with an anti-misoperation locking head matched with the anti-misoperation lock body. The second pressure plate device has simple structure, is convenient and reliable to use, can effectively prevent the operation accident of the second pressure plate device in the electric system, solves the problem that the electric system just has primary anti-misoperation equipment and has no reliable secondary anti-misoperation measure for a long time, expands the application field of the microcomputer anti-misoperation system and improves the investment efficiency. The more important is that the second pressure plate device provides a guarantee for the safe operation of the electric network.

Bailang Pan

Papers

Site rust-removing and corrosion-preventing method for steel piece of electric power system

Secondary clamping board device for electrical power system relay protection

Secondary pressure plate device for electric system relay protection