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Corrosion inhibition pretreatment filming agent and preparing method and application

A pre-filming agent and corrosion-inhibiting technology, which is applied in the coating process of metal materials, etc., can solve problems such as unsatisfactory inhibition of metal corrosion, and achieve excellent oxygen removal effects, prevent impacts, and have no risk of environmental pollution

Inactive Publication Date: 2017-05-17
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical problem that the existing conventional pre-film agent cannot satisfy the inhibition of metal corrosion

Method used

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  • Corrosion inhibition pretreatment filming agent and preparing method and application
  • Corrosion inhibition pretreatment filming agent and preparing method and application
  • Corrosion inhibition pretreatment filming agent and preparing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a kind of anti-corrosion pre-coating agent, which is composed of the following mass percentages: molybdate 20 kg, phosphate 10 kg, organic phosphonate 2 kg, oxygen scavenger 3 kg, nonionic surfactant 1 kg, 64 kg of water.

[0025] Add the formulated amount of non-ionic surfactant, phosphate, organic phosphonate, and oxygen scavenger in sequence while stirring in the formulated amount of water at 40°C, and stir until completely dissolved to obtain the corrosion inhibitor pre-film agent.

[0026] In this embodiment, the molybdate is ammonium molybdate, the phosphate is disodium hydrogen phosphate, the organic phosphonate is sodium ethylenediamine tetramethylene phosphonate, the oxygen scavenger is carbohydrazide, and the nonionic surfactant is fat Alcohol polyoxyethylene ether AEO-9.

Embodiment 2

[0028] This embodiment provides a kind of anti-corrosion pre-coating agent, which is composed of the following mass percentages: molybdate 20 kg, phosphate 10 kg, organic phosphonate 2 kg, oxygen scavenger 3 kg, nonionic surfactant 1 kg, 64 kg of water.

[0029] Add the formulated amount of non-ionic surfactant, phosphate, organic phosphonate, and oxygen scavenger in sequence while stirring in the formulated amount of water at 60°C, and stir until completely dissolved to obtain the corrosion inhibitor pre-film agent.

[0030] In this embodiment, the molybdate is sodium molybdate, the phosphate is disodium hydrogen phosphate, the organic phosphonate is sodium ethylenediamine tetramethylene phosphonate, the oxygen scavenger is carbohydrazide, and the nonionic surfactant is fat Alcohol polyoxyethylene ether AEO-9.

Embodiment 3

[0032] This embodiment provides a kind of anti-corrosion pre-coating agent, which is composed of the following mass percentages: molybdate 20 kg, phosphate 10 kg, organic phosphonate 2 kg, oxygen scavenger 3 kg, nonionic surfactant 1 kg, 64 kg of water.

[0033] Add the formulated amount of non-ionic surfactant, phosphate, organic phosphonate, and oxygen scavenger in sequence while stirring in the formulated amount of water at 50°C, and stir until completely dissolved to obtain the corrosion inhibitor pre-film agent.

[0034] In this embodiment, the molybdate is sodium molybdate, the phosphate is disodium hydrogen phosphate, the organic phosphonate is sodium ethylenediamine tetramethylene phosphonate, the oxygen scavenger is acetone oxime, and the nonionic surfactant is fatty alcohol Polyoxyethylene ether AEO-9.

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Abstract

The invention provides a corrosion inhibition pretreatment filming agent. The corrosion inhibition pretreatment filming agent is composed of the following matters including, by mass, 20-30% of molybdate, 10-15% of phosphate, 2-5% of organic phosphate, 3-5% of a deoxidant, 1-3% of a non-ionic surface active agent and 42-64% of water. The corrosion inhibition pretreatment filming agent has a good deoxidizing effect, the deoxidizing ratio is larger than 90%, and the influence of oxygen dissolving on film forming is restrained. The corrosion inhibition pretreatment filming agent has an oil contamination and rust removing effect, and the influence of oil contamination and rust on the corrosion inhibition pretreatment filming process can be well prevented, so that a formed film is more compact and firmer and capable of well restraining occurring of metal rusting. After pretreatment filming is conducted, discharging is not needed, production operation can be directly conducted, and potential environment polluting risks do not exist.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a corrosion-inhibiting pre-film agent, a preparation method and an application. Background technique [0002] The heating coil is one of the important accessories of the crude oil storage tank. Its function is to heat the crude oil in the tank in winter to ensure that the oil temperature in the tank is above the freezing point and prevent the tank from congealing. In the settling tank, the main function of the heating coil is to provide a suitable reaction temperature for crude oil demulsification. Large-scale crude oil storage tanks and settling tanks in my country are heat-tracing with steam coils. Due to the different water quality in various places and the imperfection of the boiler system for supplying heat-tracing steam to the storage tanks, the steam contains a large amount of oxygen, resulting in condensed return water after heating. Oxygen corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42C23G1/06
CPCC23C22/42C23G1/066
Inventor 徐军张新发陈怀兵郭亮李世勇吴保玉曹辉周雄兵唐莉萍安全成曲先伟段成才
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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