1 surface engineering and thermal spray characteristics and development:
The surface of thermal spray technology is an important branch of engineering, it is through the flame, arc or plasma and other sources of heat, the powder form of a linear and heated to melt the material or semi-melted state, and accelerate high-speed droplet formation wherein the substrate to form coating. Wear-resistant coating, and corrosion, and excellent high temperature and heat insulation performance, and is able to wear, corrosion or poor processing of super-size reduction caused by the repair parts. Thermal spray technology include: long-term corrosion, mechanical repair and advanced manufacturing technology, mold making and repair, manufacturing, coating and other special features four aspects. At present, the thermal spray technology has been widely used in almost all industrial fields and household goods (such as non-stick pan, electric infrared care, etc.).
The late 20th century, thermal spray technology is growing very rapidly, and quickly be widely used. 1980 to 2000, the thermal spray market changes in Table 1. To the 20th century, plasma spraying is still dominant. It is noteworthy that the high-speed flame spraying (HVOF) rapid development, will occupy 25% market share, ranking the second place. Arc spraying, because the economy is good, coating performance is superior than the flame spray coating, flame spraying will replace some techniques to third.
Surface engineering is by surface pretreatment, by surface coating, surface modification, or a variety of surface engineering technology combined treatment, changes in the surface of solid metal and non-metallic surface morphology, chemical composition and structure and stress state, in order to obtain the required surface properties of systems engineering.
Surface Engineering combines several areas of basic theory, technology and the latest results. Surface engineering technology for manufacturing the substrate surface a layer of coating or film, or by surface modification to give a special performance of many materials, the surface properties of the material much better than the material matrix, not only can greatly extend the application of the matrix material area, and solve a number of areas of materials can not meet the environmental requirements of the problem. Surface engineering technology encountered in addressing human resources development, energy, environment and other common problems plays an irreplaceable role.
Energy due to surface engineering and materials, thereby protecting a valuable resource for human survival, but also for environmental protection has played a crucial role. 21st century technology will penetrate the surface engineering industries, the promotion of social civilization and improve the quality of life.
2 the application of thermal spray technology:
(1) a large area of long-term protection technology has been widely used for long-term exposure to outdoor air spraying of steel structural parts of aluminum, zinc and alloy coating, paint brush instead of the traditional method, the implementation of cathodic protection for long-term atmospheric corrosion ; (2) thermal spraying technique to repair and strengthen the large-scale imports of key equipment and parts made; (3) HVOF technology: (4) gas deflagration-type coating technology further applications; (5) high-speed, automatic oxyacetylene flame spray technology is developing rapidly at the end; (6) thermal spray technology has been applied to chemical corrosion engineering; (7) Laser remelting technology to begin. At present, the thermal spray technology in the military, water conservancy, electric power, chemical, construction, environmental protection, biological, and many other engineering fields, etc. have been increasingly widely used in marine engineering, thermal spray has also been widely used. On the hull, deck, barge, scow, tug, etc., thermal spraying have achieved good long-term protective effect.
3 thermal spray technology in the chemical industry, petroleum industry applications
In the chemical industry, the corrosion is particularly severe, it is not only caused loss of a large number of materials and equipment, and business shutdown caused due to corrosion. Accidents and environmental pollution caused by the loss even more difficult to estimate. To prevent the "run, run, drip, drain," is the main chemical enterprise device management tasks. Set in a variety of process methods to surface hardening for the purpose of thermal spray technology can spray all of the solid-state engineering materials, and has good chemical stability, the current in the chemical industry has been increasingly widely used. Chemical media often contain sulfur and oxygen, such as fuel, alcohol, acetic acid, toluene, glycerine, syrup tank, the original sleeve mechanical seal and impeller, corrosion can be resolved by thermal spraying. General weak corrosive medium can pass through metal thermal spray aluminum, zinc, stainless steel plus closed resolved, acid, alkali and other by plastic flame spray epoxy, PTFE and other solutions. Results are quite remarkable. Thermal spraying in the chemical industry in a typical application the following aspects: 1, to low-level layer of coating material and heating replaced by stainless steel, titanium and other advanced materials of stainless steel. 2, can be used as chemical reaction tank, storage tank, mixing equipment, and pipeline anti-corrosion coating. 3, can collapse as a glass-lined equipment, good repair damaged porcelain layer.
Thermal spraying in the oil industry has also been widely used. Thermal spraying has been successfully used in oil exploration, mining and other equipment repair and protection. Thermal spray coatings have been successfully used in petroleum pipe, marine platform of long-term preservation. Installation of a downhole engineering company to introduce the arc spray technology, has solved the problem of metal corrosion, corrosion of metal to fill the field blank. Engineering company has installed the technology applied to the wire, sheet, profiles and metal equipment, corrosion resistance coating products improved after more than two times.
I am so glad this internet thing works and your article really helped me. Might take you up on that home advice you gave. Perhaps a guest appearance would be good. Thermal Spray
ReplyDelete