Abrasives are a general term for abrasives and abrasives, including abrasive products and abrasive products. Among them, abrasive products are mainly divided into two categories: corundum abrasives and silicon carbide abrasives. Specifically, there are basically the following:
1. Brown corundum abrasive, the main component is Al2O3, with medium hardness, high toughness, sharp particles, relatively low price, suitable for processing high tensile strength metals. Microcrystalline corundum abrasives and black corundum abrasives are all derived varieties.
2, brown corundum abrasive, its hardness is slightly higher than brown corundum, but the toughness is poor, easy to cut into the workpiece during grinding, self-sharpness, less heat, strong grinding ability, high efficiency. Chrome corundum abrasive is a derivative of its origin.
3, single crystal corundum abrasive, the particles are composed of a single crystal, and has a good multi-edge cutting edge, high hardness and toughness, strong grinding ability, less heat generation, the disadvantage is higher production costs, production Lower, so the price is higher. Zirconium corundum abrasive is also a crystalline compound with a slightly lower hardness, a finer crystal size and better wear resistance.
4, black silicon carbide abrasive, green silicon carbide abrasive, cubic silicon carbide abrasive, silicon carbide abrasive, etc., belongs to silicon carbide abrasive, the main component is silicon carbide SiC, high hardness, brittleness, sharp abrasive grain, good thermal conductivity, Strong wear resistance, suitable for processing hard and brittle metal and non-metal products.
Abrasive tools usually include two types of general abrasives and superhard materials.
1. Ordinary abrasives refer to abrasive tools made of the above-mentioned ordinary abrasives. According to the combination of abrasive materials, it can be divided into fixed abrasives and coated abrasives, and can be divided into ceramic abrasives, resin abrasives, rubber abrasives, and diamond abrasives according to different bonding agents.
2, super-hard material grinding tools, mainly with metal powder, metal oxide or CBN and other super-hard materials as fillers, can also be added to ordinary abrasives (such as Al2O3, SiC, etc.), with resin binder or ceramic bond or metal A grinding tool made of a bonding agent.
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The petrolatum anti-corrosion tape is made of plastic petrolatum ester, filler, paraffin oil, special preservatives, fillers, synthetic fibers and other raw materials. Gapless flexible ribbon roll. The petrolatum anti-corrosion tape can be used together with the petrolatum topcoat, the petrolatum cement and the polymer adhesive tape to form a complete anti-corrosion maintenance system.
The mineral ester anti-corrosion tape has stable properties, no curing, no hardening, no cracking, adapts to thermal expansion and contraction of workpieces with large temperature changes, has excellent plasticity and flexibility, contains volatiles within a safe range, and is harmful to the human body and the environment. No poison. It is suitable for anti-corrosion work of metal pipes and fittings, Flanges and Valves of any regular and irregular shape. It is widely used in gas, oil, water, petrochemical plants, urban construction, ships and other fields. It is also the first choice for anti-corrosion materials for steel pipelines, cast iron pipelines, joints, tees, elbows, refueling and refueling storage tanks, special-shaped prefabricated components (such as flanges, gate valves, tees, etc.), and edge plates of storage tank bases.
Scope of application
1. Pipeline anti-corrosion
From the pipelines inside and outside the factories of large-scale chemical companies, iron and steel companies, and electric power companies, to equipment pipelines in high-rise buildings, and residential pipelines, whether it is overhead, ground, underground pipe gallery, buried or not in water, all pipelines can be used. Because it does not deteriorate even at the lowest temperature, it is suitable for corrosion protection of low temperature piping such as liquefied gas, and corrosion protection of cooling water and cold air piping.
2. Anti-corrosion of flanges, pipe fittings and welds
The petrolatum anti-corrosion system is a suitable anti-corrosion material for piping connections, valves, flanges, bolts, etc. Pipes pre-coated with plastic and bitumen, etc., can also be used for welds connected in the field.
Specifications of petrolatum anti-corrosion belt:
50mm x 10M, 75mm x 10M 100mm x 10M 150mm x 10M 200mm x 10M 300mm x 10M
The thickness and width of the tape can also be customized according to the user's specific design or construction requirements.
Features of petrolatum anti-corrosion tape:
1. The thickness is uniform, soft and easy to shape
2. Low surface stress, compatible with various surfaces
3. Long-term non-drying, non-cracking,
4. Resistant to acid, alkali and salt
5, heat resistance, anti-aging, anti-organic chemical corrosion
6. Heat resistance, severe cold, easy to apply at ultra-low temperature
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