Antirust agent for water sand blasting and preparation method and application of antirust agent

A technology of anti-rust agent and thiourea, which is applied in the field of coatings, can solve the problems affecting the coating operation and the surface rust of workpieces, etc., and achieve the effects of prolonging the coating time, excellent anti-rust performance, and good coating adaptability

Pending Publication Date: 2021-11-19
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the generation of dust, relevant personnel tried to mix quartz sand with tap water to form a mixed spray material for sandblasting operations, but the ensuing problem was that the introduction of tap water could easily cause rust on the surface of the workpiece, which would affect the later coating operations

Method used

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  • Antirust agent for water sand blasting and preparation method and application of antirust agent
  • Antirust agent for water sand blasting and preparation method and application of antirust agent
  • Antirust agent for water sand blasting and preparation method and application of antirust agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of thiourea modified imidazoline quaternary ammonium salt

[0027] 20 parts by mass of isopropanol, 63 parts by mass of heptadecenyl-aminoethyl-thioureido imidazoline, 0.5 parts by mass of V 2 o 5 Add it into the reaction kettle, move 17 parts by mass of dimethyl phosphite to the high-level tank, start stirring, and when the temperature of the system rises to 80°C, add dimethyl phosphite in a dropwise manner, and the dropping time is maintained at 1h. After the addition, continue to heat up to 90°C, react for 4 hours, and cool to room temperature to obtain the thiourea-modified imidazoline quaternary ammonium salt.

[0028] (2) Preparation of antirust agent

[0029] Add 73 parts by mass of deionized water into the reaction kettle, start stirring, add 5 parts by mass of sodium molybdate, after the sodium molybdate is completely dissolved, add 2 parts by mass of zinc chloride, heat up to 50°C, and then add 5 parts by mass of glucose Sodium gluconate, afte...

Embodiment 2

[0033] (1) Synthesis of thiourea modified imidazoline quaternary ammonium salt

[0034] With 20 parts by mass of isopropanol, 64.3 parts by mass of oleic acid-triethylenetetraminethiourea modified imidazoline, 0.5 parts by mass of catalyst TiO 2 Add it into the reaction kettle, move 15.7 parts by mass of dimethyl phosphite to the high-level tank, start stirring, and when the temperature of the system rises to 80°C, add dimethyl phosphite in a dropwise manner, and the dropping time is maintained at 1h. After the addition, continue to heat up to 95°C, react for 4 hours, and cool to room temperature to obtain the thiourea-modified imidazoline quaternary ammonium salt.

[0035] (2) Preparation of antirust agent

[0036] Add 62 parts by mass of deionized water into the reaction kettle, start stirring, add 2 parts by mass of sodium phosphate, add 3 parts by mass of zinc chloride after the sodium phosphate is completely dissolved, raise the temperature to 50°C, and then add 8 parts ...

Embodiment 3

[0040] (1) Synthesis of thiourea modified imidazoline quaternary ammonium salt

[0041] 10 parts by mass of isopropanol, 60 parts by mass of heptadecenyl-aminoethyl-thioureido imidazoline, 0.5 parts by mass of catalyst V 2 o 5 Add it into the reaction kettle, move 10 parts by mass of dimethyl phosphite to the high-level tank, start stirring, and when the temperature of the system rises to 60°C, add dimethyl phosphite dropwise, and the dropping time is maintained at 1.5h. After the dropwise addition, continue to heat up to 80°C, react for 5 hours, and cool to room temperature to obtain the thiourea-modified imidazoline quaternary ammonium salt.

[0042] (2) Preparation of antirust agent

[0043] Add 84 parts by mass of deionized water into the reaction kettle, start stirring, add 2 parts by mass of sodium molybdate, do not add zinc salt after the sodium molybdate is completely dissolved, heat up to 60°C, and then add 4 parts by mass of sodium gluconate, After the sodium gluc...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to an antirust agent for water sand blasting and a preparation method and application thereof. The antirust agent for water sand blasting comprises the following raw materials in parts by mass: 2-10 parts of inorganic sodium salt, 4 to 10 parts of organic sodium salt, 0 to 5 parts of zinc salt, 10 to 30 parts of thiourea modified imidazoline quaternary ammonium salt and 45 to 84 parts of water. The thiourea modified imidazoline quaternary ammonium salt serves as a rust-proof body, C=N and C=C double bonds and P, N and S atoms can be introduced into the thiourea modified imidazoline quaternary ammonium salt to form strong chemical bonds with iron atoms, meanwhile, C=S double bonds are introduced into a hydrophilic branch chain, organic sodium salt is combined, and rapid adsorption is conducted on the surface of an iron base material to form a temporary protection film, so that H2O and O2 molecules are blocked; and then the inorganic sodium salt and the zinc salt form a deposition film, an oxidation film or a phosphating film through a series of physicochemical treatment, so that the anti-re-rusting capability of the iron base material is greatly improved, and the iron base material can be well applied to on-site water sand blasting operation.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an antirust agent for water sandblasting and its preparation method and application. Background technique [0002] The principle of sandblasting operation is to use compressed air as the power to form a high-speed jet beam to spray the spray material (corundum, quartz sand, etc.) onto the surface of the workpiece to be treated, and use the impact of high-speed sand flow to clean and roughen the surface of the substrate. The purpose is to remove floating rust on the surface of the workpiece, and at the same time increase the surface roughness to enhance the adhesion of the coating on the surface of the workpiece and prolong the durability of the coating. However, traditional sandblasting operations will inevitably produce a large amount of dust, which seriously threatens the health of construction workers on site. In order to reduce the generation of dust, relevant p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 狄志刚赵起锋徐慧张雷方健君马胜军朱东王清海
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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