High temperature, high pressure and the pressure vessel and run in the presence of hydrogen under the conditions, the corrosion of the surface of the inner wall of the reactor in order to avoid the desulfurizing reaction produce large amounts of H2S and when the reactor is stopped running, the stress caused by the of polythionic acid (H2SXO6) corrosion cracking, corrosion-resistant material in the inner wall of the reactor are usually surfacing. Molybdenum niobium as the main strengthening element of solid solution strengthening Types Of Welding Wires nickel base wrought superalloy 625, having excellent corrosion resistance and oxidation resistance, from cryogenic to 980 ℃ have high strength, toughness, fatigue strength and oxidation resistance. In the atmosphere, natural water, sea water, neutral salts and alkali weak medium is essentially non-corrosive, more demanding medium, to oxidizing acid tolerant and resistant to reducing acid medium. Excellent resistance to intergranular corrosion, stress corrosion, pitting and crevice corrosion. Both require high corrosion resistance, but also meet the high temperature corrosion resistant alloy, has been widely used in the manufacture of pressure vessels.
A large area of the inner wall of the container can be used to strip cladding technology, took over the inner wall surfacing, small diameter Flux Cored Welding Wire the surfacing welding process (FCAW) has to adapt to the current and voltage range high deposition efficiency, productivity has improved significantly, the economy is fine; welding conditions to achieve relatively easy, easy semi-automatic and automatic welding; slag detachability good weld appearance; splash is small, excellent arc stability, high pass rate, etc. and are widely used in the production.