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后腐蚀
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  “后腐蚀”译为未确定词的双语例句
     The corrosion rate of the brazing joint after dipped in the 5% H2SO4, 100℃ for 6 hours i s 4.95mm/a.
     钎焊接头经过5%的H2SO4,100℃,6h浸泡后腐蚀率为4. 95mm/a。
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     after ten years of exposure,the weight loss of L3M, LF2Y2 was lesser than the others;
     而经过长期(10年)暴露后,腐蚀失重较低的是LF2Y2、L3M;
短句来源
     . S0,, 100℃ for 6 hours is 8.44mm/a.
     钎焊接头经过5%的H2SO4,100℃,6h浸泡后腐蚀率为8. 44mm/a。
短句来源
     After studies and practices with corrosion electrochemistry and hydromechanics for years, some conclusions have been obtained, they are: Corrosion rate of anodically protected 304L/316L stainless steel is less than 0.01 mm/a, in 98%H2SO4, under 120℃. And less than 0.03mm/a, in 93%H2SO4, under 70℃. Service life of the three types facilities is above 10 years.
     经过多年腐蚀电化学和流体力学理论研究及实践经验得出:304L/316L不锈钢在低于120℃的98%H2SO4中施加阳极保护后腐蚀率≤0.01mm/a,在低于70℃的93%H2SO4中施加阳极保护后腐蚀率≤0.03mm/a,三种阳极保护不锈钢设备使用寿命均在10年以上;
     By adding corrosion inhibitor developed into the sewage, the corrosion rate is obviously decreased. Corrosion-inhibiting rates are 57.3%(20G),87.4%(15CrMo),71.2%(N80) and 77.5%(16Mn),respectively.
     加入研制的缓蚀剂后 ,腐蚀速度明显减小 ,缓蚀率分别为 :5 7.3% ( 2 0 G) ,87.4 % ( 1 5 Cr Mo) ,71 .2 % ( N80 )和 77.5 % ( 1 6 Mn)
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  相似匹配句对
     Corrosion
     腐蚀
短句来源
     REPAIRING TECHNOLOGY FOR OLD PETROLEUM PIPELINES
     输油管道腐蚀的修复技术
短句来源
     Corrosions and Corrosion Prevention Measures of Standby Turbine
     汽轮机系统停运腐蚀和防腐措施
短句来源
     The interpretation of Chinese character "后(hou)"
     考“
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     corrosion in water;
     污水腐蚀;
短句来源
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  post-corrosion
Post-corrosion investigations were performed, employing M?ssbauer spectroscopy, optical microscopy and electrochemical techniques.
      


The corrosion behavior of mild steel in soil with various moisture and microbial condition has been investigated. The results showed that with increase in soil moisture from 6.5 to 25%, the weight loss of the steel due to corrosion as well as the soil resistivity, redox potential and count of aerobic bacteria decreased, while the count of sulfate-reducing bacteria markedly increased. When the moisture was near the saturation point, there was little change of corrosion rate, and the "critical soil moisture" for...

The corrosion behavior of mild steel in soil with various moisture and microbial condition has been investigated. The results showed that with increase in soil moisture from 6.5 to 25%, the weight loss of the steel due to corrosion as well as the soil resistivity, redox potential and count of aerobic bacteria decreased, while the count of sulfate-reducing bacteria markedly increased. When the moisture was near the saturation point, there was little change of corrosion rate, and the "critical soil moisture" for corrosion was at 18~20%. The maximum pit depths occured between 12% and 15% moisture, and the minimum at over 20%. At moisture content of 6.5~20%, corrosion was mostly localized, but over 20% general corrosion predominated, The weight loss of steel in soil with intensive activity of microbes was 40~123% higher than that in microbes inhibited soil at low moisture levels. The causes for steel corrosion under various soil moisture have been discussed.

研究了不同湿度,不同接菌条件的同一土壤对钢的腐蚀作用。其结果是随着土壤湿度从6.5%上升到25%,土壤电阻,氧化还原电位,好气菌量递减,硫酸盐还原菌递增。钢的腐蚀失重随湿度提高而下降,接近饱和点(22%)后腐蚀率变化很小,腐蚀率变化临界点在湿度为18~20%之间。蚀坑深度在湿度为12~15%时最大,低于10%时次之,超过20%时最低。湿度在6.5~20%下是局部腐蚀,超过20%为均匀腐蚀。低湿度(6.5~16%)下,菌生长旺盛的比加杀菌剂抑制菌生长的土壤中,钢腐蚀失重高40~123%。文中对不同湿度土壤中钢的腐蚀原因进行了讨论。

~(63)Ni tracer distribution in the scale of NiO+Ni_3S_2 mixture has been determined. Expermental techniques involve electroplating a thin layer of ~(63)Ni to high purity nickel specimens, Oxidiging the specimens in latm O_2-10 %(SO_2+SO_3) at 700℃, and then counting the residual activity of ~(63)Ni in the corrosion product scale. Experimental results show that the perncipale transport mechanism for ~(63)Ni is short circuit diffusion, which means that the distribution has its maximum value close to the metal/scale...

~(63)Ni tracer distribution in the scale of NiO+Ni_3S_2 mixture has been determined. Expermental techniques involve electroplating a thin layer of ~(63)Ni to high purity nickel specimens, Oxidiging the specimens in latm O_2-10 %(SO_2+SO_3) at 700℃, and then counting the residual activity of ~(63)Ni in the corrosion product scale. Experimental results show that the perncipale transport mechanism for ~(63)Ni is short circuit diffusion, which means that the distribution has its maximum value close to the metal/scale interface, and decreases gradually to the scale/gas interface, It has been proposed that the way of Ni_3S_2 in influencing the transport of ~(63)Ni varies depending upon the feature of Ni_3S_2 dispersed in NiO.

利用~(63)Ni放射性同位素示踪技术,研究了在700℃、O_2-10%(SO_2+SO_3)(latm)环境下,镍被加速腐蚀过程中,~(63)Ni在(NiO+Ni_3S_2)混合产物层的分布规律。实验技术是首先在纯镍试样表面镀一层~(63)Ni,然后测量~(63)Ni在随后不同反应时间后的腐蚀产物层中的分布。实验结果表明,~(63)Ni的分布符合晶界扩散规律,即在金属初始表而位置处含量最高,并沿产物层生长方向逐渐降低。Ni_3S_2相在影响~(63)Ni传质过程特点方面所起的作用,取决于它在Ni_3S_2+NiO混合物中的分布形态。Ni_3S_2本身即可以做为一个快速扩散通道,又可通过改变Ni_3S_2+NiO混合的组织特点来影响传质过程。

This paper points out the key locations that should be taken into accountand the materials that should be made available during the first turnaroundof HF alkylation unit.Four points for attention during the shutdown andturnaround of the unit are given.The corrosion occurred in the HF alkylationunit of Tianjin Refinery that had run normally for more than 420 days issummarized and three suggestions are put forward.

本文简述了HF烷基化装置首次检修应考虑的重点检修部位和应准备的物料以及停工检修过程中应注意的四个问题,介绍了天津炼油厂 HF 烷基化装置正常生产420多天后的腐蚀情况,并提出了三点建议。

 
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