敷设在土壤中的钢质管道,是处在极为复杂的电化学腐蚀环境中。由于土壤是不均匀各向异性的电介质,可以形成类型各异的腐蚀电池,使钢质本身遭受腐蚀破坏。 异性土壤所形成的腐蚀电池,具有强烈腐蚀的特点,类似这种地带应在勘察设计时尽量避开,绕道而行。采用非熔化极惰性气体保护焊,并提高焊口绝缘等级,克服焊口的晶间腐蚀。投入电法保护,使管道处在最佳保护状态。 Steel pipe laid in the soil is in a very complex electrochemical corrosion environment. As the soil is heterogeneous anisotropic dielectric, can form different types of corrosion of the battery, so that the steel itself suffered corrosion damage. Corrosive cells formed by heterosexual soil, with a strong corrosion characteristics, similar to this area should be avoided in survey and design, detour. The use of non-melting inert gas welding, and improve the level of weld insulation, to overcome the intergranular corrosion of the weld. Invest in the protection of electricity, so that the best protection in the pipeline state.