Thread Content
Taking into account the background regarding corrosion caused by crude oil sulfides mentioned earlier, this type of corrosion can be mitigated from three perspectives: process, materials, and operation and maintenance. Process optimization for corrosion prevention involves adopting the \"one removal and four injections\" process to reduce the salt content in crude oil and neutralize the corrosive substances present in the system； Adjust the operating parameters to avoid the high-corrosion temperature range of 240°C to 400°C, and keep the flow rate of the medium at no more than 30 m/s to prevent erosion that could damage the protective film. Material upgrade selection: For areas prone to corrosion at high temperatures, chromium-molybdenum steel (such as Cr5Mo and higher grades) or 300-series austenitic stainless steels should be used. Aluminum infiltration of carbon steel or nano-modification of stainless steel surfaces can also be employed to enhance the material’s resistance to sulfur corrosion. Operation, maintenance, and protection support: targeted thickness measurement at key areas, combined with online corrosion monitoring ； A special anti-corrosion coating is applied to the inner walls of equipment. For applications such as storage tanks, cathodic protection technology is also employed. Additionally, corrosion products are regularly inspected to prevent potential safety hazards caused by the spontaneous combustion of iron sulfide compounds.