查询词典 corrosion

Enhanced corrosion protection was achieved from double layer deposits (EN deposit of about 30μm as the base coating plus alkaline ZnNi electrodeposit of about 10μm as a topcoat), which was capable of surviving 800～1000 hours of NSS without signs of corrosion.

在厚度相近的情况下，这种镀层组合可以承受800～1000hr的盐雾腐蚀，这一数值表明这种镀层组合可以为镁合金在非常严酷的腐蚀环境中提供良好的保护。

Original image on the image by ultraviolet irradiation in corrosion-resistant membrane (on the printing plate cylinder electrodeposit to the membrane corrosion) or carbon paper, the membrane to the drum, in lukewarm water, carried out by chemical etching with ferric chloride, resulting in the depth of the screen.

原版上的图像经紫外线照射成像于耐蚀膜（对印版滚筒镀层进行腐蚀所用的膜）或碳素纸上，再将此膜包裹于滚筒上，在温水中显影，通过氯化铁进行化学腐蚀，形成深浅不一的网孔。

The crevice corrosion rate of 00Cr25Ni22Mo2 in oxidative medium is much greater than that in reductive medium, but the law for titanium quite the rev erse. There is much effect of temperature on the crevice corrosion rate.

结果表明：在有缝隙的情况下， 00Cr25Ni22Mo2不锈钢在氧化性介质中的缝隙腐蚀速率明显大于在还原性介质中的缝隙腐蚀速率；工业纯钛则恰恰相反。

Intergranular corrosion and exfoliation corrosion behavior of 2195 Al-Li alloy with different aging treatment schemes were studied.

摘 要：研究了2195铝锂合金在不同时效状态下的晶间腐蚀和剥落腐蚀行为。

First, considering the volume expansion process of corroded bolt, the displacement model of mortar inner surface leaded by bolt corrosion is established after the loss of corrosion production is denoted by a filling factor. Second, based on elastic theory, the mortar cracking process is analyzed after the concept of influence coefficient of surrounding rock is introduced in the course of analyzing, and the degree of cracking course affected by surrounding rock parameter is also analyzed; the finite element method is adopted to verify the results.

考虑锚杆锈蚀体积膨胀过程，以填充系数表示砂浆开裂过程中锚杆锈蚀产物的损失，建立了锚杆锈蚀后砂浆内部位移模型，以弹性力学为基础，引入围岩参数影响系数概念，对锚杆锈蚀导致砂浆保护层开裂过程以及围岩参数对开裂过程的影响程度等进行了分析研究，并采用有限元分析方法对其进行了验证。

The results show that the stress corrosion is the main failure causing of the bellows expansion joint,while the local pit corrosion,residual stress and the working stress is the necessary condition.

结果表明，应力腐蚀是该膨胀节失效的主要原因，而局部的点蚀和残余应力、工作应力是应力腐蚀的必要条件。

This paper in view of present crude oil units running situation and the existence prominent question, in cooer with progress of production has carried out the corrosion mechanism research, the anticorrosion measure and the corrosion actually tests and analysis, the security and reliability analysis and the life forecast research, with the research of out and inner our country and the production actuality ,which provides a practical and feasible base for guaranteeing the equipment in the long-term and steady safe operation.

本文针对目前国内稠油加工常减压装置的生产运行现状和存在的突出问题，结合国内外研究工作和生产实际开展了稠油加工装置故障树分析、腐蚀机理、防腐措施、腐蚀实验、安全可靠性分析和寿命预测等方面的研究工作，为提高我国石油炼化装置的安全可靠性提供了理论基础和新的方法。

Knife-type valve: Features 1, ultra-structure length, saving materials, piping systems can greatly reduce the overall weight of 2, the effective space occupied by small, can effectively support the strength of pipelines can reduce the possibility of pipeline vibration 3, flashboard selected austenitic stainless steel, Corrosion performance greatly improved, which can effectively prevent the corrosion caused by gate leakage sealing diarrhea 4, on the use of flexible packing seal PTFE, sealing reliable, flexible and lightweight 5, the gate with Knife function, can effectively break the gates of all types of media objects

刀型闸阀：产品特点 1、超短结构长度，节省材料，可使管路系统整体重量大大减轻 2、占用有效空间小，能有效支持管道的强度，可减少管道振动的可能性 3、闸板选用奥氏体不锈钢，耐腐性能大大提高，可有效的防止由于闸板腐蚀引起的密封泻漏 4、上密封填料采用柔性 PTFE ，密封可靠、操作轻便灵活 5、闸板具有闸刀的功能，能有效的闸断介质中各类杂物

For the condensation system of gas from top outlet of fractionator, severe corrosion remains happen if the proportion of neutralizer and corrosion inhibitor is not well and the quantity of which is not sufficient.

抑制装置腐蚀的发生还要从腐蚀的机理出发，从各个对腐蚀有影响的环节入手，如电脱盐注水和加热炉注水的质量特别是盐含量，以及电脱盐的操作等。

The water treatment chemicals investigated in this work include flocculating agent, germicide, corrosion inhibitor and scale inhibitor. The green properties of water treatment chemicals are determined according to pollution resulted from their uses in oil field and their production processes, while their treatment performences are done from the experimental effects in oil field. The evaluation results are given for flocculating agents, germicides, corrosion inhibitors and scale inhibitors used in Daqing Oil Field.

对于水处理剂产品，本文主要考虑产品的使用和生产过程对环境的污染，以确定产品的绿色属性；通过详细调研，给出了一些产品在使用过程中的处理性能，最终确立油田用水处理剂产品的综合性能，同时针对水处理剂中的四大类产品—絮凝剂、杀菌剂、缓蚀剂和阻垢剂分类进行了比较，为油田用水处理剂产品的使用提供了较有说服力的数据，也为其它油田化学品的使用和评价提供了借鉴。

Those who loved reading were obliged to send for their books from England; the members of the junto had each a few

那些喜欢看书的人就得从英国购书，讲读俱乐部的的成员每人都有几本。

Three fourths of the earth's surface is covered with water.

地球表面的四分之三被水覆盖着。