SMAW
ENiCrMo-7 coated electrode is used for C-4 alloy shielded metal arc welding. Weld metals are resistant to corrosion attacks from a variety of sources, including contaminated inorganic acids and chlorine-contaminated media. In addition, electrodes can be used for surfacing and cladding of carbon and stainless steel when higher corrosion resistance is required. The coating is designed for high maneuverability, especially in misaligned welds. Due to its stability, the alloy can be welded without the risk of sensitization, which is the formation and diffusion of harmful second phase precipitates in the grain boundaries of the welding heat affected zone (HAZ). Like certain other nickel alloys, it is malleable, easy to form and weld, and has a significant ductile corrosion cracking in chloride-containing environments. It can survive in oxidizing or non-oxidizing acids and, due to its significant chromium and molybdenum concentrations, resists pitting and crevice erosion in the presence of chloride and other halides.
