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Inorganic-organic compound hole sealing coating

A sealing and inorganic technology, applied in the field of coating, can solve the problems of limited use and achieve good hydrophobicity and oil repellency, wide application and low coefficient of friction

Inactive Publication Date: 2012-07-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional antifouling coatings contain toxic substances such as organic tin and organic arsenic. With the strengthening of environmental protection regulations, their use has been restricted. Therefore, finding effective non-toxic antifouling agents has become the focus of research in the field of materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) With TEOS and Al(NO 3 ) 3 as precursors, EtOH and H 2 O is a solvent, hydrochloric acid is a catalyst, and SiO is prepared 2 -Al 2 o 3 Sol sealant. Measure 5ml of deionized water, weigh Al(NO 3 ) 3 Add 5.6g into deionized water, stir to dissolve to obtain solution 1; dissolve 3ml TEOS in 10mlH 2 After 0, add hydrochloric acid to adjust the pH value to 3-4 to obtain solution 2; mix the above two solutions of 1 and 2 evenly, and stir with a magnetic stirrer, after stirring for about 15 minutes, add 0.2g hexagonal boron nitride, and continue stirring for 1 hour , aging at room temperature for 5h, the SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 2.6×10 -3 (N·S / m 2 ).

[0028] (2) Put the P7412 sample prepared by plasma spraying into acetone and ultrasonically clean it, then clean it with distilled water, and finally clean it with deionized water, and dry it before use. The above-mentioned coating was sealed by dipping-pulling method, and the surface...

Embodiment 2

[0032] (1) With TEOS and Al(NO 3 ) 3 as precursors, EtOH and H 2 O is a solvent, hydrochloric acid is a catalyst, and SiO is prepared 2 -Al 2 o 3 Sol sealant. Measure 5ml of deionized water, weigh Al(NO 3 ) 3 Add 5.6g into deionized water, stir to dissolve to obtain solution 1; dissolve 3ml TEOS in 10mlH 2 After 0, add hydrochloric acid to adjust the pH value to 3-4 to obtain solution 2; mix the above-mentioned 1 and 2 solutions evenly, and stir with a magnetic stirrer. After stirring for about 15 minutes, add 0.3 g of whisker silicon, and continue stirring for 1 hour. After aging for 4 hours at room temperature, SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 2.8×10 -3 (N·S / m 2 ).

[0033] (2) Put the plasma sprayed P7418 coating sample into acetone and ultrasonically clean it, then clean it with distilled water, and finally clean it with deionized water, and dry it before use. The above-mentioned coating was sealed by dipping-pulling method, and the surface...

Embodiment 3

[0037] (1) Measure 4.4ml of deionized water, weigh Al(NO 3 ) 3 Add 11.25g into deionized water, stir to dissolve to obtain solution 1; dissolve 2.2ml TEOS in 8.8mlEtOH, then add hydrochloric acid to adjust the pH value to 3-4, and obtain solution 2; mix the above two solutions of 1 and 2 evenly , and stirred with a magnetic stirrer, after stirring for about 15min, add 0.3g of mica flakes, continue to stir for 0.5h, and age at room temperature for 3h to obtain SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 3.1×10 -3 (N·S / m 2 ).

[0038] (2) Put the P7412 sample prepared by plasma spraying into acetone for scrubbing, then wash it with distilled water, and finally wash it with deionized water, and dry it with an airflow dryer before use. The above-mentioned coating was sealed by ultrasonic impregnation-lifting method, and the surface-treated sample was placed in SiO 2 -Al 2 o 3 Immerse in the sol for 40s, then slowly pull the sample at a uniform speed, the pulling s...

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Abstract

The invention relates to an inorganic-organic compound hole sealing coating comprising two parts of a hole sealing layer and an anti-fouling layer, wherein the hole sealing layer is formed by an inorganic hole sealing agent through a dipping-pulling method and a thermal processing method on a test sample after surface processing, the anti-fouling layer is formed by an organic anti-fouling agent through the dipping-pulling method and the thermal processing method on the hole sealing layer, and the inorganic hole sealing agent is an SiO2-Al2O3 colloidal sol hole sealing agent; the organic anti-fouling agent is polytetrafluoroethylene diluent which is prepared by taking polytetrafluoroethylene dispersing liquid, distilled water and a non-ionic type surfactant as raw materials. The preparation method of the inorganic-organic compound hole sealing coating provided by the invention comprises two parts of preparing the inorganic hole sealing layer and preparing the organic anti-fouling layer. The inorganic hole sealing layer provided by the invention can obviously lower the porosity of the coating and obviously enhance the erosion resistance performance and the high-temperature resistance performance of the coating; the organic anti-fouling layer can effectively lower the surface energy of the coating, enables stains not to be easy to attach to the surface of the coating and has favorable anti-fouling function.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an inorganic-organic composite sealing coating for thermal spraying ceramic coatings. Background technique [0002] Thermal spraying ceramic coating is a layered accumulation structure formed by numerous deformed particles interlaced and stacked together in waves, so there are inevitably some pores between particles in the coating. When the coating is used for wear resistance, a certain amount of pores in the coating can be used to store lubricants, which is beneficial to friction reduction; but when used for corrosion-resistant coatings, the corrosive medium will penetrate into the surface of the substrate and interact with the substrate The reaction will cause the corrosion of the substrate, which will greatly reduce the corrosion resistance and service life of the coating, and may even cause the coating to crack and fall off, resulting in the failure of the coating. Therefore, in orde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89C04B28/00
Inventor 程旭东孟令娟张琦肖巍闵捷叶菲王珂万倩
Owner WUHAN UNIV OF TECH
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