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海水代替淡水进行水压试验是节省水压试验时间和淡水成本的有效方法。08MnNiVR是我国新研制的重要的大型储罐用钢,但08MnNiVR储罐进行海水水压试验的可行性尚未得到验证。采用电化学实验、浸泡实验和慢应变速率拉伸实验研究了储罐钢08MnNiVR在海水和淡水中的耐腐蚀性能,重点比较其在海水和淡水中腐蚀性能的差异,为08MnNiVR储罐进行海水水压试验提供实验基础和数据支持。结果表明:在海水和淡水中,08MnNiVR的自腐蚀电流差别不大,自腐蚀电位变化趋势基本一致,腐蚀率接近,应力腐蚀敏感性都很低,说明储罐钢08MnNiVR在海水和淡水中耐蚀性能接近,进行海水水压试验已具备实验基础。(表2,图7,参12)
Sea water replaces fresh water for hydrostatic testing is an effective way to save on hydraulic test time and freshwater costs. 08MnNiVR is a newly developed large-scale steel for storage tanks in China. However, the feasibility of 08MnNiVR tanks for seawater pressure testing has not been verified yet. The corrosion resistance of 08MnNiVR steel in seawater and freshwater was studied by electrochemical experiment, immersion test and slow strain rate tensile test. The difference in corrosion performance between seawater and freshwater was mainly compared with that of 08MnNiVR tank Pressure test provides experimental basis and data support. The results show that there is no significant difference in self-corrosion current of 08MnNiVR between seawater and freshwater, and the trend of self-corrosion potential is basically the same. The corrosion rate is close to that of 08MnNiVR, which indicates that 08MnNiVR is corrosion resistant in seawater and freshwater Performance close to the sea water pressure test has the experimental basis. (Table 2, Figure 7, reference 12)