点腐蚀

大约10min之后，点腐蚀才开始发生。

The pitting corrosion took place after ten minutes immersion .

结果表明烟气管道腐蚀区域呈现典型的均匀腐蚀，喷射管、布气管腐蚀区域呈现典型的点腐蚀形貌，腐蚀产物中S、O、Cl等元素大量超标。

Experimental results show that the corrosion area of the piping shows typical uniform corrosion . The corrosion area of ejector pipe and gas distribution pipe represents a typical pitting corrosion and the contents of S , O and Cl contained in the corrosion product are seriously beyond the standard .

Fe为余量。通过X射线衍射，均匀腐蚀、点腐蚀、晶间腐蚀实验，研究了该合金的显微组织及其腐蚀行为。

The microstructure and corrosion behavior of the alloy were studied by X-ray diffraction and experiments of uniform , intergranular and pitting corrosion .

基于损伤理论，将用于评价体积型缺陷的APIRP579公式进行了改进，建立了点腐蚀损伤管道的剩余强度评价公式。

Based on damage theory , residual strength assessment formula has been developed by modifying API RP 579 formula for volumetric flaw evaluation .

离子注入后，由于注入过程改变了合金表面的电荷分布，使表面富含结构羟基（OH），合金的抗点腐蚀能力比仅仅进行氧化处理的样品明显提高。

The corrosion resistance , especially the pitting-corrosion resistance was greatly improved with more structural hydroxyl ( - OH ) on the surface of NiTi alloy after ion implantation .

炼油厂冷却水系统硫酸盐还原菌对316L不锈钢点腐蚀的研究

Investigation of sulfate-reducing bacteria on pitting of 316L stainless steel in cooling water system for oil refinery

通用的304L、316L等奥氏体不锈钢在含氯介质中的耐局部腐蚀性能较差，常见的破坏形态是点腐蚀。

The resistance to local corrosion by common austenitic stainless steel such as 304L and 316L in Cl-containing media is poor , and the frequently seen damage form is spot corrosion .

钛酸盐转化处理的样品经336h盐雾试验表面无点腐蚀发生。

No spot corrosion occurs on the surface of the sample with titanate conversion coating after 336 h of salt spray test .

研究了腐蚀特别是点腐蚀过程产生声发射（AE）的源机制及AE信号特点，推导了AE信号幅度与腐蚀深度及频率的关系，并说明该关系对利用AE技术监测腐蚀损伤的意义。

Studies are made on the source mechanism and characteristics of acoustic emission ( AE ) signals produced by corrosion , especially pitting corrosion . Relationship between AE amplitude and corrosion depth and frequency is deduced , and the significance of the relation in estimating corrosion damage is emphasized .

结果表明，用SUS316L不锈钢制造的内衬在尿素生产的条件下主要发生了两种类型的腐蚀：点腐蚀和应力腐蚀开裂；

Results of examination showed that two types , of corrosion , i. e. , pitting corrosion and stress corrosion cracking , occurred on the 316L stainless steel lining under conditions of urea production .

结果表明，采用直径为3.2mm的低氢焊条，在105A的焊接电流下，可以直接补焊的点腐蚀坑剩余壁厚为4.4mm；采用补板焊接时，焊缝间距应大于100mm。

It is shown that residual thickness of corrosion dent directly repaired by low-hydrogen electrode of 3.2 mm diameter is 4.4 mm under the welding current of 105 A , and when the flat applied , weld distance shall greater than 100 mm .

点腐蚀损伤管道剩余强度的评价方法

Residual Strength Assessment Method of Pipeline Containing Damage of Pitting Corrosion

循环冷却水系统中铜镍合金点腐蚀影响因素分析

Corrosion Failure Analysis of Copper-Nickel Alloy in Cooling Water System

双点腐蚀管道的弹塑性有限元分析

The elastic and plastic finite element analysis of double points corrosive pipe

不锈钢裸表面在氯化物溶液中的点腐蚀

Pitting Corrosion of Fresh Stainless Steel Surface in Chloride Solution

在用压力容器表面点腐蚀对超声波探伤的影响

Effect of Surface Pitting Corrosion of In-service Pressure Vessel on Ultrasonic Testing

研究了不锈钢去膜表面在氯化镁介质中的点腐蚀现象。

The pitting corrosion of the fresh stainless steel surface have been studied .

2205不锈钢的点腐蚀试验的研究

The Test of Dot Taint for 2205 Stainless Steel

6063铝型材表面点腐蚀缺陷分析

A Study of Pitting Corrosion Defect on the Surface of 6063 Aluminum Extrusion

腐蚀试验表明，添加微量稀土元素可增强抗点腐蚀敏感性。

Corrosion test shows that proper rare earth addition enhance the general corrosion sensitivity .

应用时间序列分析方法预测油气管线点腐蚀深度扩展

Predicting the Pitting Depth Growth in Oil & Gas Pipelines with the Times Series Analysis Method

对消防车常见的腐蚀形式&点腐蚀、缝隙腐蚀和电偶腐蚀进行了介绍。

Common corrosion forms of spot corrosion , split corrosion and galvanic corrosion of fire engine were introduced .

基材的主要腐蚀类型为晶界腐蚀，沉积层的腐蚀类型为点腐蚀。

The main corrosion pattern of substrate is crystal boundary corrosion , and that of deposition layer is pitting corrosion .

产生缺陷的原因是运输、储存过程中与腐蚀性介质接触造成钢管局部点腐蚀。

The reason of defect generation is local spot corrosion due to contact with the corrosive medium in the transportation and storage .

综述了局部腐蚀如应力腐蚀破裂及点腐蚀作用下设备寿命预测技术的进展。

Advances in life prediction technology for structures suffering localized corrosion such as pitting and stress corrosion cracking are surveyed and discussed .

点腐蚀试验结果表明，在整个试验过程中，钎料表面表现为均匀腐蚀，点蚀的迹象不明显。

Point corrosion testing indicated that there is not point corrosion mark , and uniform corrosion characteristic was present to the filler metal .

研究表明：在模拟的桥面雨水环境下，电弧喷锌涂层为均匀腐蚀，无机富锌涂层和环氧富锌涂层为点腐蚀。

The uniform corrosion mechanism for arc spraying zinc coating and dot corrosion mechanism for inorganic and epoxy rich zinc coatings are summarized .

在对点腐蚀形成的机理和影响因素的详细介绍和304不锈钢点腐蚀原因分析的基础上，提出了对不锈钢管道点腐蚀的预防措施。

And the formation mechanism and influencing factors of pitting corrosion were introduced , and the causes of pitting corrosion of304stainless steel pipeline were analysed .

2205不锈钢材料的点腐蚀试验是以三氯化铁+盐酸的混合溶液为特征，其中氯离子的腐蚀作用直接影响着测试结果。

In the test of dot taint for 2205 stainless steel , taint effect of chlorine ion directly influences testing result according to character of mixture liquor .

抛光液中添加成分的选择：三酸化学抛光液中含有硝酸，硝酸在铝化学抛光中的主要作用是抑制点腐蚀，提高抛光亮度。

Polishing liquid additive selection : traditional triple-acid chemical polishing liquid includes nitric acid which plays an important role in pitting erosion restriction and polishing brightness improvement .