Rusty scale growth inhibitor for rusted steel and preparation method thereof

Abstract

The invention discloses a rusty scale growth inhibitor for rusted steel. The rusty scale growth inhibitor is prepared from the following raw materials in parts by weight: 50-100 parts of inorganic acid, 50-100 parts of gallic acid, 10-100 parts of aluminum triphosphate, 10-50 parts of potassium hydrogen tartrate, 30-50 parts of thiourea, 100-300 parts of isoamylol, 10-50 parts of surfactant, 1-50 parts of defoamer, 1-30 parts of thickener and 500-800 parts of water. The inhibitor can infiltrate into the deep part of the rusty scale, acts with active gamma-FeOH, and inhibits transformation to Fe3O4, so as to inhibit growth of an iron scale. In addition, chelate transformation reaction also can be carried out on the existing iron scale, and the iron scale is transformed into an inert protection layer. The inhibitor is broad in demands on the thickness of the rusty scale, does not cause corrosion to a steel base material, and can replace artificial derusting treatment, and the rusted steel base material reacting by the inhibitor can be directly coated with an anticorrosive primer.

Description

technical field

[0001] The invention relates to a rust reaction material, in particular to a rust layer growth inhibitor for rusty steel and a preparation method thereof. Background technique

[0002] Iron and steel components are easily corroded in the atmospheric environment, which will affect the operation of the equipment. In order to prevent the continuous corrosion of steel components, the rust layer on the surface is generally removed by rust removal, and then painted with anti-corrosion paint to isolate it from the corrosion caused by the atmosphere. Due to the complex and cumbersome operation of the iron and steel rust removal process, and the rust is easy to return, the cost of anti-corrosion is virtually increased. Converting the rust layer into a protective layer by chemical treatment is a relatively good anti-corrosion method at present, and has become a trend in steel anti-corrosion technology.

[0003] In the current existing technologies, products such as r...

Examples

preparation example Construction

[0022] Its preparation method of rust layer growth inhibitor for above-mentioned rusty steel material comprises the following steps:

[0023] (1) Add 50-100 parts of gallic acid to 200-300 parts of water at 65°C to 70°C to dissolve, then add 100-300 parts of isoamyl alcohol and mix well before use;

[0024] (2) Dissolve 50-100 parts of inorganic acid, 10-100 parts of aluminum tripolyphosphate, 10-50 parts of potassium hydrogen tartrate and 30-50 parts of thiourea in 300-500 parts of 20 ℃ ~ 40 ℃ warm water;

[0025] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 10-50 parts of surfactant, 1-50 Add 1-30 parts of antifoaming agent and 1-30 parts of thickener to the solution in turn, and filter to obtain rust layer growth inhibitor for rusty steel.

Embodiment 1

[0028] Get 75 parts by weight of phosphoric acid, 50 parts of gallic acid, 30 parts of aluminum tripolyphosphate, 20 parts of potassium hydrogen tartrate, 30 parts of thiourea, 240 parts of isoamyl alcohol, 20 parts of surfactants, 10 parts of defoamer, 25 parts of thickener and 500 parts of water, operate according to the following steps:

[0029] (1) Add 50 parts of gallic acid to 200 parts of water at 65°C to 70°C to dissolve, then add 240 parts of isoamyl alcohol and mix well before use;

[0030] (2) Dissolve 75 parts of phosphoric acid, 30 parts of aluminum tripolyphosphate, 20 parts of potassium hydrogen tartrate and 30 parts of thiourea in 300 parts of water at 20°C to 40°C in sequence;

[0031] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 20 parts of surfactant and 10 parts of disinfectant A foaming agent and 25 parts of a thickening ag...

Embodiment 2

[0036] Get 100 parts by weight of phosphoric acid, 50 parts of gallic acid, 10 parts of aluminum tripolyphosphate, 10 parts of potassium hydrogen tartrate, 50 parts of thiourea, 200 parts of isoamyl alcohol, 10 parts of surfactant, 10 parts of defoamer, 30 parts of thickener and 530 parts of water. Follow these steps:

[0037] (1) Add 50 parts of gallic acid to 200 parts of water at 65°C to 70°C to dissolve, then add 200 parts of isoamyl alcohol and mix well before use;

[0038] (2) Dissolve 100 parts of phosphoric acid, 10 parts of aluminum tripolyphosphate, 10 parts of potassium hydrogen tartrate and 50 parts of thiourea in 330 parts of water at 20°C to 40°C;

[0039] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 10 parts of surfactant and 10 parts of disinfectant A foaming agent and 30 parts of a thickening agent are sequentially added into ...

technical field

[0001] The invention relates to a rust reaction material, in particular to a rust layer growth inhibitor for rusty steel and a preparation method thereof. Background technique

[0002] Iron and steel components are easily corroded in the atmospheric environment, which will affect the operation of the equipment. In order to prevent the continuous corrosion of steel components, the rust layer on the surface is generally removed by rust removal, and then painted with anti-corrosion paint to isolate it from the corrosion caused by the atmosphere. Due to the complex and cumbersome operation of the iron and steel rust removal process, and the rust is easy to return, the cost of anti-corrosion is virtually increased. Converting the rust layer into a protective layer by chemical treatment is a relatively good anti-corrosion method at present, and has become a trend in steel anti-corrosion technology.

[0003] In the current existing technologies, products such as r...

Examples

preparation example Construction

[0022] Its preparation method of rust layer growth inhibitor for above-mentioned rusty steel material comprises the following steps:

[0023] (1) Add 50-100 parts of gallic acid to 200-300 parts of water at 65°C to 70°C to dissolve, then add 100-300 parts of isoamyl alcohol and mix well before use;

[0024] (2) Dissolve 50-100 parts of inorganic acid, 10-100 parts of aluminum tripolyphosphate, 10-50 parts of potassium hydrogen tartrate and 30-50 parts of thiourea in 300-500 parts of 20 ℃ ~ 40 ℃ warm water;

[0025] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 10-50 parts of surfactant, 1-50 Add 1-30 parts of antifoaming agent and 1-30 parts of thickener to the solution in turn, and filter to obtain rust layer growth inhibitor for rusty steel.

Embodiment 1

[0028] Get 75 parts by weight of phosphoric acid, 50 parts of gallic acid, 30 parts of aluminum tripolyphosphate, 20 parts of potassium hydrogen tartrate, 30 parts of thiourea, 240 parts of isoamyl alcohol, 20 parts of surfactants, 10 parts of defoamer, 25 parts of thickener and 500 parts of water, operate according to the following steps:

[0029] (1) Add 50 parts of gallic acid to 200 parts of water at 65°C to 70°C to dissolve, then add 240 parts of isoamyl alcohol and mix well before use;

[0030] (2) Dissolve 75 parts of phosphoric acid, 30 parts of aluminum tripolyphosphate, 20 parts of potassium hydrogen tartrate and 30 parts of thiourea in 300 parts of water at 20°C to 40°C in sequence;

[0031] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 20 parts of surfactant and 10 parts of disinfectant A foaming agent and 25 parts of a thickening ag...

Embodiment 2

[0036] Get 100 parts by weight of phosphoric acid, 50 parts of gallic acid, 10 parts of aluminum tripolyphosphate, 10 parts of potassium hydrogen tartrate, 50 parts of thiourea, 200 parts of isoamyl alcohol, 10 parts of surfactant, 10 parts of defoamer, 30 parts of thickener and 530 parts of water. Follow these steps:

[0037] (1) Add 50 parts of gallic acid to 200 parts of water at 65°C to 70°C to dissolve, then add 200 parts of isoamyl alcohol and mix well before use;

[0038] (2) Dissolve 100 parts of phosphoric acid, 10 parts of aluminum tripolyphosphate, 10 parts of potassium hydrogen tartrate and 50 parts of thiourea in 330 parts of water at 20°C to 40°C;

[0039] (3) Add the solution prepared in step (1) dropwise to the solution prepared in step (2) while stirring until it is completely mixed, then sonicate for 15 minutes, and finally add 10 parts of surfactant and 10 parts of disinfectant A foaming agent and 30 parts of a thickening agent are sequentially added into ...