pitting corrosion

The pitting corrosion damage of pipeline was considered as uniform hole-type damage based on the damage theory. The degradation regularity of apparent yield strength and elastic modulus of damaged pipeline steel was investigated by tension test of specimen with artificial holes.

基于损伤理论，将管壁点腐蚀损伤层材料视作孔洞型均匀损伤材料，通过模拟多孔材料拉伸实验，研究了孔洞型损伤管线钢表观弹性模量和屈服强度退化规律。

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The pitting corrosion potential of 316 stainless steel increases along with the ammonia nitrogen density decrease.

在模拟中水中,随着氨氮浓度的增加,316不锈钢的孔蚀电位减小.

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The corrosion forms include pitting corrosion, intergranular corrosion, abrasive corrosion-erosion, galvanic corrosion and crevice corrosion.

腐蚀形态主要有点蚀 、 晶间腐蚀 、 磨损腐蚀(冲刷) 、 电偶腐蚀和缝隙腐蚀.

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The Influence of the Fresh Water Component on the Pitting Corrosion of Aluminium Brass and Tin Brass Tubes

淡水成分对铝黄铜管和锡黄铜管点蚀的影响

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Study on pitting corrosion behavior of titanium alloy surface with ion implantation

氮离子注入钛合金表面的耐点蚀性能研究

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The pitting corrosion, salt spray, immersion, atmospheric corrosion and magnetic properties of the Fe-13% Cr and Fe-17% Cr alloys with different content of Mo element have been systematically and comprehensively investigated.

在Fe-13%Cr和Fe-17%Cr中添加不同含量的钼，对合金的抗点蚀、盐雾腐蚀、浸泡腐蚀以及大气腐蚀的能力和相应的磁性能进行了系统、全面的研究。

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Tensile Characteristics of Steel for Oil and Gas Pipeline with Simulative Pitting Corrosion

模拟点蚀油气管线钢的拉伸性能

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The cause pitting appeared during hard chromium plating pitting corrosion occurred on matrix local surface.

镀硬铬时出现麻点主要与基体表面局部产生点蚀有关.

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It was shown that Na 2 CO 3 inhibited the pitting corrosion of aluminum alloy to some extent.

实验结果表明,碳酸钠对铝合金具有较好的缓蚀作用,在一定程度上抑制了铝合金的点蚀.

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Study on the protection potential against pitting corrosion of A3 steel and 304 SS

A3钢及304不锈钢孔蚀保护电位的确定

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The results indicated that the defects was caused by pitting corrosion of impurity element iron in silver coin by environmental chloride compound.

结果表明，在银币缺陷部位的腐蚀坑内存在以铁元素为主的物质，基材中的铁元素与外界的氯引起银币的腐蚀，造成了表面缺陷。

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The mechanism of porous oxygen electrode to accelerate pitting corrosion of bronze ware has been put forwarded.

提出了加速青铜器小孔腐蚀的多孔氧电极机理。

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Study on Pickling Process and Pitting Corrosion of 316L Stainless Steels

316L不锈钢酸洗工艺及耐点蚀性能研究

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The anodic polarization behaviour and the initiation and propagation processes of pitting corrosion of TUP copper have been studied by electro-chemical method and surface analysis technique in mixed solution of low Cl~-and SO_4~ ( 2-) but high HCO_3~-concentrations.

选用低Cl~-、低SO4~（2-）浓度&高H CO3~-浓度的混合溶液，用电化学方法及表面分析技术研究了磷脱氧铜（TUP）的阳极极化行为及孔蚀引发和扩发过程。

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The experimental results show that a singlephase austenitic structure and a excellent pitting corrosion resistance are obtained after solution heat treatment at 1050 ℃ for 2h.

试验结果表明，该钢经1050℃保温2h固溶处理后，可得到单相的奥氏体组织，具有良好的抗点蚀性能。

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The flow induced corrosion rate of the cast duplex stainless steel in flowing 3.5% NaCl solution became slowly quick with the increase of medium flow velocity. Local serious pitting corrosion occurred on the surface of the cast duplex stainless steel under high speed flow velocity.

铸造双相不锈钢在流动3.5%NaCl溶液中的腐蚀速度随着介质流速的增大而缓慢上升，高流速条件下，其表面发生了严重的坑、点等局部腐蚀。

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Pitting corrosion was found on the inner surface of 304L stainless steel pipes, which was exposed to nitrogen gas containing bromine ions.

通有含溴离子氮气的304L不锈钢管，经一段时期的使用后产生了严重点蚀。

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The stainless steel that had good pitting resistance in tidal zone possessed good resistance to crevice corrosion.

耐点蚀性能较好的不锈钢，耐缝隙腐蚀性能也较好。

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Pitting corrosion behavior of 304L stainless steel in nitrogen gas containing bromine ion

304L不锈钢在溴离子作用下的点蚀行为

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When flow velocity reaches 2.62 m/ s, the local corrosion is pitting corrosion and the protective corrosion product film can not form on the test coupon surface at the temperature of 100 ℃ and the CO_2 pressure of 0.03 MPa.

在流体速度为2.62m/s的情况下，温度为100℃、CO2分压为0.03MPa时，发生的局部腐蚀主要为点蚀，试样表面未能形成保护性腐蚀产物膜；

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The scanning photos show that magnesium alloys for corrosive pitting corrosion types in 3.5% NaCl solution.

由扫描照片的结果可知，镁合金在3.5%NaCl溶液中的腐蚀类型为点蚀。

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The pitting corrosion potential gradually decreased with the increase of Cl~-concentration;

随着Cl-浓度的增加，点蚀电位逐渐降低；

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Pitting Corrosion of Ni_Based Alloy in Thiosulfate_ion Containing Chloride Solutions

镍合金在含硫代硫酸根离子之氯化钠水溶液中的孔蚀研究

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