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High-temperature-oxidation-resistant and corrosion-resistant coating and preparation method thereof

A high-temperature oxidation-resistant and corrosion-resistant technology, used in coatings, metal material coating processes, melt spraying, etc., can solve the problems of large environmental pollution and low production efficiency, and achieve uniform and dense coating structure, good resistance to various Corrosion-like medium performance, the effect of improving corrosion resistance and wear resistance

Pending Publication Date: 2021-04-09
中机凯博表面技术江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems of large environmental pollution and low production efficiency caused by the paint coating process, the modification of the existing steel surface anti-corrosion and high-temperature oxidation resistance used in the marine environment provides a high-temperature oxidation-resistant, corrosion-resistant Coatings and their preparation methods

Method used

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  • High-temperature-oxidation-resistant and corrosion-resistant coating and preparation method thereof
  • High-temperature-oxidation-resistant and corrosion-resistant coating and preparation method thereof

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Embodiment 1

[0034] A method for preparing a high-temperature oxidation-resistant and corrosion-resistant coating, comprising the steps of:

[0035] (1) Mix the raw materials of 35wt% cobalt, 30wt% chromium, 30wt% molybdenum and 5wt% silicon according to the ratio, and then use the water atomization method to make spherical particles of alloy powder, with a particle size of 5 μm to 30 μm and a bulk density of The density is 5.5g / cm 3 ~6g / cm 3 stand-by;

[0036](2) The stainless steel substrate to be processed is manually wiped clean with alcohol and dried at 50°C, and then the surface of the substrate is subjected to sand blowing treatment, and the sand blowing treatment uses compressed air as power, and utilizes high-speed sand flow The impact effect of the material is used to roughen the surface of the substrate. The material of the sand blasting sand is white corundum, the sand blowing pressure is 0.6MPa, and the sand blowing distance is 100mm, which is ready for use;

[0037] (3) Th...

Embodiment 2

[0039] A method for preparing a high-temperature oxidation-resistant and corrosion-resistant coating, comprising the steps of:

[0040] (1) Mix the raw materials of 40wt% cobalt, 30wt% chromium, 20wt% molybdenum and 10wt% silicon according to the ratio, and then use the water atomization method to make spherical particles of alloy powder, with a particle size of 40 μm to 60 μm and a bulk density of The density is 4.8g / cm 3 ~5g / cm 3 stand-by;

[0041] (2) Clean the stainless steel base material to be processed by ultrasonic cleaning with acetone and dry it at 80°C, then perform sand blowing treatment on the surface of the base material, the sand blowing process uses compressed air as the power, and utilizes high-speed sand flow The impact effect is used to achieve the roughening of the surface of the substrate. The material of the sand blasting sand is white corundum, the sand blowing pressure is 0.4MPa, and the sand blowing distance is 80mm, which is ready for use;

[0042]...

Embodiment 3

[0044] A method for preparing a high-temperature oxidation-resistant and corrosion-resistant coating, comprising the steps of:

[0045] (1) Mix the raw materials of 45wt% cobalt, 30wt% chromium, 23wt% molybdenum and 2wt% silicon according to the ratio, and then use the water atomization method to make alloy powder spherical particles with a particle size of 15 μm to 45 μm and a bulk density of The density is 5.2g / cm 3 ~5.8g / cm 3 stand-by;

[0046] (2) Clean the stainless steel base material to be processed by ultrasonic cleaning with acetone and dry it at 80°C, then perform sand blowing treatment on the surface of the base material, the sand blowing process uses compressed air as the power, and utilizes high-speed sand flow The impact effect of the material is used to roughen the surface of the substrate. The material of the sand blasting sand is white corundum, the sand blowing pressure is 0.5MPa, and the sand blowing distance is 120mm, which is ready for use;

[0047] (3)...

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Abstract

The invention relates to a high-temperature-oxidation-resistant and corrosion-resistant coating and a preparation method thereof. The preparation method comprises the following steps of, mixing 35-50 wt% of cobalt, 15-35 wt% of chromium, 15-30 wt% of molybdenum and 2-10 wt% of silicon in proportion to prepare alloy powder for later use; cleaning and drying substrate to be machined, and then carrying out roughening treatment on the surface of the base material for later use; spraying the alloy powder to the surface of the substrate through hypersonic flame to obtain the high-temperature-oxidation-resistant and corrosion-resistant coating; and carrying out heat treatment at 800-1150 DEG C for 60 min after the coating is obtained. The coating prepared by the method has good resistance to various corrosive media and high-temperature oxidation resistance up to 900 DEG C in severe environments such as normal temperature and even high-temperature corrosion, and can ensure that metal substrates such as high-strength stainless steel and the like can keep a stable and good use state for a long time in the severe environments.

Description

technical field [0001] The invention relates to the technical field of steel surface modification, in particular to a high-temperature oxidation-resistant and corrosion-resistant coating and a preparation method thereof. Background technique [0002] Marine equipment and marine engineering have been working in a harsh marine corrosive environment for a long time, and the unavoidable problem in service is the corrosion of marine engineering materials in the marine environment. In the marine environment, the corrosion of marine engineering materials has seriously restricted the development of major marine engineering technology and equipment, and it has seriously affected the reliability and life of marine engineering and equipment. Corrosion of materials and protection technology have become marine urgent problems in engineering. High-quality steel materials, titanium alloys, non-ferrous metals, composite materials, and protective coatings for ships, offshore platforms, oil ...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/08
CPCC23C4/129C23C4/08
Inventor 徐世霖陈松冯健冯二彬荣震
Owner 中机凯博表面技术江苏有限公司
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