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研究了阴极保护对四种材料X60、AISI 32l、316L和F5在酸性液/固双相流10％H_2SO_4+15％刚玉砂介质中冲刷腐蚀的保护效果,重点研究了阴极保护度随流速的变化规律。结果表明:阴极保护一般能有效降低材料的冲刷腐蚀速率,保护度达32％～100％。对同一材料而言,阴极保护率随流速提高而减小,而同一流速下,四种材料的阴极保护率依X60、AISI 321、316L和F5的次序减小。对于钝化材料(如F5)在低流速条件下施加阴极保护可能出现负效应。
The protective effect of cathodic protection on erosion erosion of four materials X60, AISI 32l, 316L and F5 in acid liquid / solid two-phase flow 10% H 2 SO 4 + 15% corundum was studied. The changes of cathodic protection degree with the flow rate were studied emphatically law. The results show that cathodic protection can effectively reduce the erosion rate of materials with a degree of protection of 32% -100%. For the same material, the cathodic protection decreases with increasing flow rate, while the cathodic protection of the four materials decreases with the order of X60, AISI 321, 316L and F5 at the same flow rate. Negative effects can occur with cathodic protection applied to passivating materials such as F5 at low flow rates.