A special inorganic sealing agent for thermal spray coating and its preparation method and application
A technology of sealing agent and thermal spraying, which is applied in the direction of coating, metal material coating process, anti-corrosion coating, etc., which can solve the problems of complex sealing process, high temperature resistance and high sealing cost, and achieve corrosion resistance Excellent, improved water resistance, good sealing effect
Inactive Publication Date: 2014-10-01
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] Aiming at the technical defects of the existing sealing agent that the sealing is not resistant to high temperature, the sealing process is relatively complicated and the sealing cost is high, the present invention provides a new type of special inorganic sealing agent for thermal spray coating and its preparation method and sealing process. After the coating is sealed, it has excellent high temperature resistance and corrosion resistance, the water absorption rate of the coating is greatly reduced, and the water resistance performance is significantly improved, which will greatly improve the insulation and corrosion resistance of the ceramic coating and expand the application of the ceramic coating. range, especially in some occasions that require high temperature and high pressure resistance, corrosion resistance, and high insulation performance
Method used
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Embodiment Construction
[0043] The preparation method and application of the sealing agent of the present invention will be described in detail below according to the drawings and specific embodiments
[0044] Step 1: Preparation of inorganic sealing agent
[0045] First, according to the mass fraction (shown in Table 2) ingredients, mix the mixture evenly.
[0046] Table 2 Chemical composition of inorganic sealing materials
[0047] Make up
SiO 2
Al 2 O 3
B 2 O 3
Na 2 CO 3
CaF 2
ZnO
Ni 2 O 3
Na 5 P 3 O 10
TiO 2
Co 2 O 3
Content
36.12
5.15
17.16
18.38
3.52
6.32
2.06
6.24
4.05
1
[0048] The second step: Put the mixture into a crucible, and then put it in an ordinary electric furnace and heat it to 500°C for 30 minutes to remove the moisture in the raw meal and Na 2 CO 3 Decompose to release CO 2 gas.
[0049] The third step: continue to heat up to 900 ℃, keep for 1.5 hours to obtain a uniform molten glass frit. Then pour into cold water to quench. Finally, the glass frit is taken out of the ...
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Abstract
The invention discloses a novel special inorganic hole-sealing agent for a thermal-spraying coating as well as a preparation method and an application thereof. The special inorganic hole-sealing agent is prepared from the following raw materials in percentage by weight: 30-38% of SiO2, 3-8% of Al2O3, 15-19% of B2O3, 16-20% of Na2CO3, 2-5% of CaF2, 5-8% of ZnO, 2-3% of Ni2O3, 4-7% of Na5P3O10, 3-5% of TiO2 and 1% of CoO; and during preparation, the raw materials aforementioned are mixed, heated to 500-600 DEG C and insulated for 20-30 minutes, then heated to 800-900 DEG C and insulated for 1-2 hours, water-quenched, and ball-milled to obtain minus 325-mesh powder, and the powder is added in 40wt% anhydrous alcohol and then sealed and stood. The hole-sealing coating treated by the hole-sealing agent disclosed by the invention is of an amorphous structure, excellent in corrosion resistance and good in thermal stability.
Description
Technical field [0001] The invention relates to a thermal spray coating inorganic sealing agent and sealing technology. Aiming at the thermal spray coating used in a corrosive environment, an inorganic sealing agent and sealing agent with excellent high temperature stability and corrosion resistance is designed. Hole technology, eliminating the influence of pores in the coating on corrosion resistance. Background technique [0002] Thermal spraying is a surface treatment method that impacts particles in a molten or semi-molten state on the surface of a substrate at high speed, deforms and deposits, and obtains a coating with specific properties. The thermal spray coating is a lamellar structure composed of deformed particles superimposed on each other in structure. There must be pores between the superimposed deformed particles. This is determined by the principle of thermal spray coating formation and cannot be avoided. The existence of voids in the coating will inevitably redu...
Claims
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IPC IPC(8): C23C4/18C09D1/00C09D5/08
Inventor 孙宏飞王灿明崔洪芝
Owner SHANDONG UNIV OF SCI & TECH