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

A power system and steel technology, applied in the direction of metal material coating process, etc., can solve the problems of easy corrosion and rust, waste, and difficulty in removing rust and anti-corrosion of power equipment.

Inactive Publication Date: 2011-03-23
STATE GRID ZHEJIANG PINGHU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to solve the problems that power equipment, especially field power equipment, is easy to corrode and rust, and it is difficult to remove rust and anticorrosion of such equipment, and the equipment is prone to failure, and the replacement of equipment needs to be switched off, resulting in a lot of waste and serious consequences. Therefore, the present invention provides an on-site derusting and anti-corrosion method for steel parts in a power system. The method has a good effect on derusting and anti-corrosion of power equipment, can realize maintenance without power outage, reduce the frequency of power outage maintenance, and provide maximum protection for local production and life. It also reduces the inspection intensity of electric equipment and reduces the labor intensity of staff

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The preparation of embodiment 1 " four in one " surface treatment liquid

[0064] Formula (components and content per liter of "four-in-one" surface treatment solution):

[0065] h 3 PO 4 (85%) 100ml / L

[0066] Zinc powder 10g / L

[0067] Manganese nitrate 2g / L

[0068] NaNO 2 3g / L

[0069] Tartaric acid 20g / L

[0070] OP-10 1.5g / L

[0071] water balance

[0072] Preparation steps:

[0073] Set the volume of the "four-in-one" surface treatment solution to be prepared. Calculate the required amount of each component and the amount of water according to the formula (at this time, the amount of water can be an approximate amount). Get two-thirds of the required water, add the amount of phosphoric acid under stirring, add the amount of zinc powder after mixing, and then add the amount of manganese nitrate and sodium nitrite (NaNO 2 ), tartaric acid, stir to dissolve completely. Dissolve OP-10 (alkylphenol polyoxyethylene ether) in warm water...

Embodiment 2～8

[0076] The formulations for the preparation of the "four-in-one" surface treatment solution in Examples 2-8 are shown in the table below. The preparation method is the same as that of Example 1. Values ​​in the table, H 3 PO 4 (85%) is the number of milliliters per liter of surface treatment liquid, and others are the number of grams per liter of surface treatment liquid.

[0077] "Four in one" surface treatment fluid formula

[0078]

[0079]

[0080]Note: In the table, nickel nitrate, copper nitrate, sodium fluoride, and sodium m-nitrobenzenesulfonate are phosphating reaction accelerators; sodium chlorate and sodium perborate are oxidants; citric acid and tartaric acid are polyhydroxy organic acid complexing agents ; OP-10, CTAB, and LAS are surfactants, wherein OP-10 is a nonionic surfactant, CTAB is a cationic surfactant, and LAS is an anionic surfactant. The zinc content in zinc oxide is 81.38%, and the zinc content in zinc dihydrogen phosphate is 22.14%.

Embodiment 9

[0082] Moderately corroded transformer radiator oil valve bolts with moderate oil stains on the surface. Use a steel wire brush to remove floating rust and dust on the surface of the bolts on site, and then apply the "four-in-one" surface treatment solution prepared in Example 2 to the surface of the bolts. Pay attention to the complete and uniform brushing without any accumulation of liquid. After the phosphating film is completely dry, first apply a layer of epoxy zinc-rich primer, and then apply a layer of high-chlorinated polyethylene anti-corrosion topcoat after the primer is completely dry. There is no need to cut off the power or disassemble the bolts, and the rust removal and anticorrosion treatment of the bolts can be completed online. After one year, the treated bolts have no traces of rust on the surface and have good corrosion resistance.

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Abstract

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, 0.2 to 7.5g of phosphatizing reaction accelerant, 0.5 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.

Description

technical field [0001] The invention belongs to a metal surface treatment method, and relates to an on-site derusting and anticorrosion method for steel structural parts of an electric power system, especially fastening parts of electric equipment. technical background [0002] The power system is a power production and consumption system composed of power generation, power transmission, power transformation, power distribution and power consumption. Its function is to convert the primary energy in nature into electric energy through the power generation device, and then supply the electric energy to various users through power transmission, transformation and distribution. [0003] A large number of steel parts need to be used in the power system, such as the casing of power equipment, iron towers, brackets, fasteners for equipment installation, etc. Since a large number of electrical equipment is installed in the wild, and exposed to wind, sun, and rain, steel parts will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/17
Inventor 潘建乔钱国良车江嵘栾伊斌陆翔潘白浪张健刘胜利
Owner STATE GRID ZHEJIANG PINGHU POWER SUPPLY
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