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铝—4%混合稀土金属的扩散涂层,延长了被指定用于化工设备和热处理炉上的合金的使金用寿命,改善了抗渗碳和抗硫化物侵蚀的能力。在许多高温石油化工及冶金过程中经常遇到含硫或渗碳的气体环(土井)。合金钢的设备零件的腐蚀破坏并不少见。例如,在火焰加热器中使用的管辺[如热解和氢气脱硫进料炉及氢气去烃烷反应田炉]和热处理炉零件的使用寿命,都由于它们抗硫侵蚀
The diffusion coating of aluminum - 4% mixed rare earth metal extends the service life of the alloys specified for use in chemical plants and heat treatment furnaces and improves the resistance to carburization and sulfide attack. In many high-temperature petrochemical and metallurgical processes often encounter sulfur or carburizing gas ring (Doi). Corrosion of equipment parts of alloy steel is not uncommon. For example, the service life of tubes and tubes used in flame heaters [such as pyrolysis and hydrogen desulfurization and hydrogen-to-alkane reaction furnaces] and heat-treating furnace parts are all due to their resistance to sulfur attack