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Aluminum Oxide Blasting Services INR   0 INR  0
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Aluminum Oxide Blasting Services

Aluminum Oxide Blasting Aluminum oxide is an extremely hard chemical compound that is formed by a combination of aluminum and oxygen. As a blasting abrasive, aluminum oxide is known for its superior hardness and strength, as well as its low heat retention. Because aluminum oxide has the ability to cut into just about any type of metal surface, it is a popular choice in a variety of sandblasting applications.

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Stress Relieving Services INR   0 INR  0
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Stress Relieving Services

Stress Relieving Services A Mythri Metallizing (P) Ltd., we are rather proud to boast that we are equipped with the state-of-the-art , a 5x3x2.5 meters furnace for the purpose of Stress Relieving at our works in Peenya Industrial Area, Bangalore. Machining induces stresses in parts. The bigger and more complex the part, the more the stresses. These stresses can cause distortions in the part long term. If the parts are clamped in service, then cracking could occur. Also hole locations can change causing them to go out of tolerance. For these reasons, stress relieving is often necessary. Typically, the parts that benefit from stress relieving are large and complex weldments, castings with a lot of machining, parts with tight dimensional tolerances and machined parts that have had a lot of stock removal performed. Stress Relieving is the controlled heating and cooling of metals to alter their physical and mechanical properties without changing the product shape. Stress relieving is sometimes done inadvertently due to manufacturing processes that either heat or cool the metal such as welding or forming. Stress relieving is done at about 650°C for about one hour or till the whole part reaches the temperature. This removes more than 90% of the internal stresses. Alloy steels are stress relieved at higher temperature. After removing from the furnace, the parts are air cooled in still air. Stress Relieving is often associated with increasing the strength of material, but it can also be used to alter certain manufacturability objectives such as improve machining, improve formability, restore ductility after a cold working operation. Thus it is a very enabling manufacturing process that can not only help other manufacturing process, but can also improve product performance by increasing strength or other desirable characteristics. Steels are particularly suitable for heat treatment, since they respond well to heat treatment and the commercial use of steels exceeds that of any other material.

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TSA Coating Service INR   0 INR  0
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TSA Coating Service

TSA Coating Service Thermal sprayed aluminium (TSA) coatings are widely specified for the protection of steels from aqueous corrosion, including offshore structures and components that are exposed to seawater immersion, tidal and splash zone environments. In this paper, the performance of TSA coatings prepared by conventional and newer wire thermal spray systems is presented. The TSA coatings were characterized in terms of deposition efficiency, coating micro structure including porosity and oxide content, surface roughness and coating adhesion. A cost analysis for coating deposition using the various systems is included. The corrosion behavior of the coatings was compared using an accelerated electrochemical corrosion test method. In addition, longer-term free immersion tests of up to 31 days were conducted in 3.5wt% NaCl solution, pH 7.9-8.2, 22-25°C. The TSA coating performance was quantified in terms of its free corrosion potential and the corrosion rate which was estimated from linear polarization resistance (LPR) measurements. The ability of the TSA coatings to provide adequate cathodic protection to exposed bare steel in immersed saline environment has been demonstrated. The newer systems have been shown to produce TSA coatings of improved quality and the effect of this on longer-term corrosion protection of steel substrates in immersed saline environment is discussed. Thermal Spray coating of Aluminium involves deposition of Aluminium of 99.5% purity over the prepared abrasive blasted surface. The sprayed metal is melted by using electric arc that is atomized with compressed air and projected over the substrate. According to the IS & BS Standards, the coating should be resistant up to 950 C temperature. The Aluminizing process is used to protect parts operating in high temperature environments against corrosion and oxidation. As a result, the most common parts coated are high temperature industrial chimney and muffler. Advantages : Site-job possible No size limitation Better surface preparation Cold process Pure aluminium coating Ideal surface for painting Standards : IS: 739 BS: 2569 Part I & II IS: 2590 BS: 1475

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