1) pitting corrosion
点蚀
1.
Analysis on the plastic limit load of gas pipe elbows with pitting corrosion;
含点蚀缺陷燃气管道弯管的塑性极限载荷分析
2.
Recognition and quantitative analysis of pitting corrosion defect of underwater structures;
水下结构物点蚀缺陷的识别与定量分析
3.
Experiment study of monitoring pitting corrosion of low carbon steel with acoustic emission technology;
低碳钢点蚀过程声发射监测实验
2) pitting
[英]['pitiŋ] [美]['pɪtɪŋ]
点蚀
1.
Effects of electrode pitting morphology on resistance spot welding of aluminum alloy;
电极点蚀形貌对铝合金电阻点焊的影响
2.
Law and feature of pitting caused by inclusion in carbon steel;
碳钢中夹杂物诱发点蚀的规律和特性研究
3.
Study of pitting sensitivity of low-alloy hull steel;
低合金船体钢点蚀敏感性的研究
3) pit corrosion
点蚀
1.
The tests reveal that the corrosion damage is caused by the pit corrosion of chlorine ions.
试验证明,腐蚀破坏是氟离子的点蚀造成的,并指出对不锈钢作阳极氧化处理后耐蚀性增强,并建议使用含钼较高的1Cr18Ni9TiMo不锈钢作搅拌桨。
2.
The detailed analysis of contusion failure of FCC main fractionator overhead recycle oil heat exchanger tubes,concludes that the corrosion of external wall of heat exchanger is mainly the comprehensive corrosion of H_2S-HCl-NH_3-H_2O while the internal corrosion is main- ly the pit corrosion by chlorine ion and oxygen depolarization.
文章对催化裂化装置分馏塔顶循环油换热器管束腐蚀穿孔原因进行了详细分析,指出换热器管外壁的腐蚀主要是H_2S-HCl-NH-3-H_2O型的全面腐蚀,管内壁主要是氯离子及氧的去极化引起的点蚀。
3.
Stress corrosion cracking and pit corrosion of steam generators in Tianwan Nuclear Power Plant is described,The cause of corrosion is preservation method which is not correct during transportation and installation,measurement and suggestions for safe operation of steam generator is proposed.
田湾核电站蒸汽发生器在冷态和热态调试结束后发生了穿晶型应力腐蚀裂纹及点蚀,其腐蚀原因可能为运输及安装期间保养措施不当。
4) Corrosive pitting
点蚀
1.
The analysis of corrosive pitting about the points-line meshing gear;
点线啮合齿轮点蚀的失效分析
2.
Setting off from the lubricating principle and gear itself,the causes of gear corrosive pitting in axial-flow fan and the influence of lube on gear corrosive pitting are analyzed.
从润滑原理和齿轮自身特点出发,分析了轴流风机齿轮发生点蚀的原因和润滑油对齿轮点蚀的影响,结合现用润滑油品的使用效果,得出润滑油粘度选用不当对风机齿轮形成点蚀有加速作用的结论,据此结论提出风机齿轮润滑油品选用建议。
5) point corrosion
点蚀
1.
Analysis and deal with gear s point corrosion of 4m winder gearbox;
对4m绞车减速器齿轮点蚀问题的分析和处理
2.
The existance of the dead area in the preheater created by over saturated water, and over high of partial concentration of chloric ion lead to leaking and point corrosion.
分析了环氧乙烷装置二氧化碳吸收塔进料预热器管束泄漏及出口管线弯头开裂的原因,指出工艺气体在预热器内经过水饱和后,由于预热器内死区的存在,氯离子局部浓度过高,最终导致管束(母材为304 SS)发生点蚀泄漏;管线弯头(母材为304 LSS)的开裂则源于工艺气体中水的过饱和以及应力的共同作用,发生了氯离子应力腐蚀开裂。
6) spot corrosion
点蚀
1.
From the samples,by means of chemical composition analysis,mechanical property examination,appearance inspection,metallographic examination,SEM and EDS,we discovered that the stress corrosion cracking(scc) appeared as a result of the spot corrosion in the inside wall of the pipeline.
通过取样进行化学成分分析、机械性能测试、外观检验、金相检验、扫描电镜和X射线能谱分析发现,由于管道内壁发生点蚀损伤,进而发生应力腐蚀开裂。
补充资料：点蚀
分子式：
CAS号：
性质：又称坑蚀，斑点腐蚀，小孔腐蚀或点蚀。金属表面大部分区域腐蚀相对较轻，而某些局部出现向纵深发展的腐蚀小孔的腐蚀形态。孔蚀的原因是活性阴离子导致表面钝化膜局部破坏。具有钝化能力的金属如不锈钢、铝合金及碳钢等，在含氯离子介质中经常发生孔蚀。蚀孔的发展速度有时很快，可以深入金属甚至短时间内蚀穿金属截面，且较难预测，因此孔蚀往往比均匀腐蚀具有更大的危害性。可以通过降低介质中的有害阴离子浓度，采用涂层保护、添加缓蚀剂和阴极保护等方法予以减轻或防止。
CAS号：
性质：又称坑蚀，斑点腐蚀，小孔腐蚀或点蚀。金属表面大部分区域腐蚀相对较轻，而某些局部出现向纵深发展的腐蚀小孔的腐蚀形态。孔蚀的原因是活性阴离子导致表面钝化膜局部破坏。具有钝化能力的金属如不锈钢、铝合金及碳钢等，在含氯离子介质中经常发生孔蚀。蚀孔的发展速度有时很快，可以深入金属甚至短时间内蚀穿金属截面，且较难预测，因此孔蚀往往比均匀腐蚀具有更大的危害性。可以通过降低介质中的有害阴离子浓度，采用涂层保护、添加缓蚀剂和阴极保护等方法予以减轻或防止。
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参考词条