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Corrosion behavior of steel in the juncture area of sea clay and sand was studied. The results show that galvanic corrosion occurred between steel samples buried in sea clay and sand, and that the polarity of the galvanic cell reversed after some testing later. The cause of reversing of polarity is discussed. 相似文献
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The Al-basic sacrificial anode is widely used to protect steel construction from corrosion in seawater,but is not suitable for protecting steel in freshwater. In the estuary area, seawater and freshwater mix anddifferent seawater salinity can be formed in different mixing sites between freshwater and seawater. Basedon the requirements of the Shengli Petroleum Administrative Bureau of China, the effect of seawatersalinity on electrochemical properties of Al-basic anode was studied under laboratory conditions by themethod given in National Standard GB 4948-85 (China Starndard Bureau, 1985). No obvious effectwas found when seawater salinity was 30 to 10, but obvious effect on anodic open circuit potential, closedcircuit potential and current efficiency was found when seawater salinity was 5. These values are lowerthan those given in the Naional Standard. 相似文献
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海洋构筑物在海洋环境中的腐蚀是相当严重的。从腐蚀的角度，一般都把钢铁设施在海洋环境中的腐蚀分为５个区带［１～５］。即海洋大气区、浪花飞溅区、海水潮差区、海水全浸区、海底泥土区、钢铁设施在各区带的腐蚀情况也不相同。根据各区带腐蚀的轻重情况，分别采取适合于各区带的防蚀措施，以延长海洋设施的使用寿命，这就需要外海的长尺挂样试验。外海的长尺挂样试验需要大量的人力、物力，工作量大，不便于随时观察和测试，周期较长。由于狂风暴雨的袭击，试样很容易丢失，试样一丢失，工作也就前功尽弃。根据以上的种种情况，作者精心… 相似文献
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Laboratory and field tests on our newly developed embeddable reference electrode for reinforced concrete show it can be embedded into reinforced concrete structures and be used for measuring the potentials of the rebar or other metal elements in the outer structural part exposed to seawater. Its potential varies little with the change of Cl~ concentration of the electrolyte and is stable over a time range of 260 days. The electrode can be used for monitoring corrosion and cathodic protection of reinforced concrete structures in seawater. 相似文献
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电连接模拟法十年腐蚀试验研究 总被引：2，自引：0，他引：2
在开发海洋所需要的设施中，例如海上采油平台，海上输油码头，海底管线，海上观察测量仪器，海上运输船舶等大都使用钢材来制造。但是由于海水是一种强电介质溶液，使得钢材在海洋环境中遭受着严重腐蚀，这直接影响着海上设施的使用寿命。为了研究钢铁本身的耐腐蚀性能，腐蚀试验方法越来越被腐蚀工作者所重视。即用什么样的腐蚀试验方法来比较、评定所研制钢种的耐腐蚀性能是一项重要工作。室内的电化学测试及加速腐蚀试验等方法为海洋用钢的研制起到了积极作用，它可以较快地对钢铁的耐腐蚀性能进行相对评定［１６，２０，２１］，但有些… 相似文献
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