Liquid deposition preparing method for anti-corrosion TiO2-ZrO2 coating and anti-corrosion metal with anti-corrosion TiO2-ZrO2 coating

A liquid deposition, anti-corrosion technology applied to anti-corrosion metals. It can solve the problems of no coating anti-corrosion performance test, large injection amount, complicated process, etc., to overcome the porous or cracked coating, solve the corrosion problem, and the preparation method is simple.

Inactive Publication Date: 2016-03-02
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used anti-corrosion measures in the geothermal water utilization system are: (1) adding oxygen scavengers and corrosion inhibitors to the geothermal water, but there are problems of large investment in related equipment and complicated processes, and at the same time, the injection volume is large, causing environmental pollution , and it is not conducive to the recharge of geothermal water
(2) The equipment and pipelines used in the geothermal system are made of corrosion-resistant materials, such as titanium alloys, but they are expensive and difficult to implement
Chinese patent CN101760737A prepared a nano-titanium dioxide coating on a stainless steel substrate by liquid phase deposition, and found that the coating has enhanced heat transfer and anti-fouling properties, but the anti-corrosion performance of the coating needs to be improved
[0006] Based on the above patents and journal documents, it can be seen that there is no chemical liquid deposition method to prepare ZrO in the prior art. 2 -TiO 2 Composite coating preparation process, and there is currently no relevant research on the anti-corrosion performance test of the prepared coating and its use in corrosion protection of equipment and pipelines in geothermal water systems

Method used

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  • Liquid deposition preparing method for anti-corrosion TiO2-ZrO2 coating and anti-corrosion metal with anti-corrosion TiO2-ZrO2 coating
  • Liquid deposition preparing method for anti-corrosion TiO2-ZrO2 coating and anti-corrosion metal with anti-corrosion TiO2-ZrO2 coating
  • Liquid deposition preparing method for anti-corrosion TiO2-ZrO2 coating and anti-corrosion metal with anti-corrosion TiO2-ZrO2 coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A corrosion-resistant TiO 2 -ZrO 2 The liquid phase deposition preparation method of coating comprises the following steps:

[0046] 1) Take 200mL of distilled water, divide it into four parts, 20mL, 80mL, 70mL and 30mL, dissolve 4.04g (NH 4 ) 2 TiF 6 (mass content 98%), 2.49gH 3 BO 3 (mass content 99.5%), 5.80gZr(SO 4 ) 2 4H 2 O (mass content 98%) and 11.18g (NH 4 ) 2 S 2 o 8 (The mass content is 98%). get (NH 4 ) 2 TiF 6 Aqueous solution, H 3 BO 3 Aqueous solution, Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 Aqueous solution; the resulting solution was left to stand and filtered to remove particles visible to the naked eye, and then used.

[0047] 2) will (NH 4 ) 2 TiF 6 aqueous solution and H 3 BO 3 After the aqueous solution was mixed, it was filtered again to obtain a clear solution A.

[0048] 3) Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 The aqueous solutions were mixed to give clear solution B.

[004...

Embodiment 2

[0056] Embodiment 2 A kind of anti-corrosion TiO 2 -ZrO 2 Liquid phase deposition preparation method of coating :

[0057] 1) Take 200mL of distilled water, divide it into four parts, namely 20mL, 80mL, 70mL and 30mL, and dissolve 0.40g (NH 4 ) 2 TiF 6 (mass content 98%), 0.12gH 3 BO 3 (mass content 99.5%), 0.73gZr(SO 4 ) 2 4H 2 O (mass content 98%) and 0.23g (NH4 ) 2 S 2 o 8 (The mass content is 98%). get (NH 4 ) 2 TiF 6 Aqueous solution, H 3 BO 3 Aqueous solution, Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 Aqueous solution; the resulting solution was left to stand and filtered to remove particles visible to the naked eye, and then used.

[0058] 2) will (NH 4 ) 2 TiF 6 aqueous solution and H 3 BO 3 After the aqueous solution was mixed, it was filtered again to obtain a clear solution A.

[0059] 3) Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 The aqueous solutions were mixed to give clear solution B.

[0060] 4) Mix...

Embodiment 3

[0067] Embodiment 3 A kind of corrosion-resistant TiO 2 -ZrO 2 Liquid phase deposition preparation method of coating :

[0068] 1) Divide 200mL of distilled water into four parts, namely 20mL, 80mL, 70mL and 30mL, and dissolve 8.08g (NH 4 ) 2 TiF 6 (mass content 98%), 9.94gH 3 BO 3 (mass content 99.5%), 7.25gZr(SO 4 ) 2 4H 2 O (mass content 98%) and 27.94g (NH 4 ) 2 S 2 o 8 (The mass content is 98%). get (NH 4 ) 2 TiF 6 Aqueous solution, H 3 BO 3 Aqueous solution, Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 Aqueous solution; the resulting solution was left to stand and filtered to remove particles visible to the naked eye, and then used.

[0069] 2) will (NH 4 ) 2 TiF 6 aqueous solution and H 3 BO 3 After the aqueous solution was mixed, it was filtered again to obtain a clear solution A.

[0070] 3) Zr(SO 4 ) 2 aqueous solution and (NH 4 ) 2 S 2 o 8 The aqueous solutions were mixed to give clear solution B.

[0071] 4) Mix ...

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Abstract

The invention discloses a liquid deposition preparing method for an anti-corrosion TiO2-ZrO2 coating. (NH4)2TiF6, H3BO3, Zr(SO4)2 and (NH4)2S2O8 serve as raw materials, metal is deposited for 5 h to 48 h under the water bath condition at the temperature ranging from 20 DEG C to 80 DEG C according to a liquid deposition method, the deposited metal is washed through distilled water and aired and is then put in a high-temperature muffle furnace, the temperature is increased to 400 DEG C to 800 DEG C, calcination is kept for 1 to 5 hours, and therefore the TiO2-ZrO2 coating is prepared on the surface of the metal. Through tests, when prepared stainless steel with the TiO2-ZrO2 coating is compared with untreated stainless steel, the corrosion current density of a polarization curve of the stainless steel with the coating in a terrestrial heat aqueous solution is reduced by about one order of magnitude, the polarization resistance of the stainless steel is improved by 15 to 23 times, the annual corrosion rate is increased by 80% to 90%, and the good corrosion resistant effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal coatings, in particular to an anti-corrosion TiO 2 -ZrO 2 The liquid phase deposition preparation method of the coating and the anti-corrosion metal containing the coating. Background technique [0002] Due to the presence of a large number of corrosive components in geothermal water, the surface of equipment and pipelines in the process of geothermal energy utilization is prone to electrochemical corrosion, which has hindered the efficient utilization of geothermal energy. The commonly used anti-corrosion measures in the geothermal water utilization system are: (1) adding oxygen scavengers and corrosion inhibitors to the geothermal water, but there are problems of large investment in related equipment and complicated processes, and at the same time, the injection volume is large, causing environmental pollution , and it is not conducive to the recharge of geothermal water. (2) The equipment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12
CPCC23C18/1216
Inventor 蔡永伟全学军
Owner CHONGQING UNIV OF TECH
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