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用失重法和电化学方法研究了对硝基苯甲酸钠对碳钢（２０号钢）腐蚀和氧化皮－碳钢电偶腐蚀的缓蚀行为。在５０°Ｃ的５．０×１０－３ｍｏｌ／ｌＮａＣｌ溶液中，对硝基苯甲酸钠在浓度≤５．５×１０－３ｍｏｌ／ｌ时促进碳钢腐蚀，浓度在１．０×１０－２－１．５×１０－２ｍｏｌ／ｌ范围时缓蚀率达９６％，浓度高于１．５×１０－２ｍｏｌ／ｌ时缓蚀率下降。极化曲线表明，对硝基苯甲酸钠对碳钢的阴阳极过程均有抑制作用，对阳极过程的抑制更强烈，在适当浓度时可使碳钢钝化。浓度为１．０×１０－２ｍｏｌ／ｌ的对硝基苯甲酸钠对氧化皮－电偶腐蚀的缓蚀率达９８％。
The corrosion inhibition behavior of sodium p-nitrobenzoate on carbon steel (steel 20) and galvanic corrosion of scale-carbon steel were investigated by weight loss method and electrochemical method. At 50 ° C 5.0 × 10-3mol / lNaCl solution, sodium nitrobenzoate in the concentration of ≤ 5.5 × 10-3mol / l promote carbon steel corrosion at a concentration of 1.0 × 10-2- Corrosion inhibition rate was 96% in the range of 1.5 × 10-2mol / l. When the concentration was higher than 1.5 × 10-2mol / l, the corrosion inhibition rate decreased. Polarization curves show that sodium p-nitrobenzoate inhibits both the anode and the cathode of carbon steel and inhibits more strongly the anodic process, which can passivate the carbon steel at appropriate concentrations. The concentration of 1.0 × 10-2mol / l of p-nitrobenzoate on scale - galvanic corrosion corrosion rate of 98%.