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四川目前生产的天然气中含硫天然气占７１％，而含硫天然气对高强度钻杆会产生硫化物应力腐蚀玻裂，因此，在含硫气井进行钻杆测试时，应重视钻杆的安全问题。文章探讨了高强度钻杆硫化物应力腐蚀玻裂的机理和影响钻杆脆断时间的各种因素，并提出在一定的条件下，高强度钻杆在含硫气并中进行测试是安全的。采用向钻杆内加缓蚀剂或内涂层钻杆，防硫油管测试，钻杆测试更加安全。建议继续开展高强度钻杆硫化物应力腐蚀玻裂时间的试验研究，以确定合理的钻杆测试安全时间。     

Dental amalgam – the effect of the technology of alloy powder preparation on the corrosion behaviour and the release of mercury

Dental amalgams are based on a broad spectrum of materials differing in their chemical composition, metallurgical treatment, and in the way the initial alloys powders are prepared. In addition to their chemical composition, amalgams based on various powders differ in both their microstructure and the amount of mercury needed for preparation. All these facts may affect electrochemical processes occurring during their interaction with oral fluids, and also mercury release. While verifying the effect of the technology used for the preparation of the high‐copper ternary alloy powder on the properties of resulting amalgams, this study aimed at the mechanism of their interaction with a model saliva solution as well as mercury release was included. Measurements were done in a model saliva solution using standard electrochemical methods and exposition measurements. The interaction of individual types of amalgams with artificial saliva did not reveal any significant differences. The free corrosion potential of all these amalgams in an aerated solution settled in the range of values in which tin oxidation, resulting in a layer of insoluble corrosion producsts, turned out to be the dominant anodic process. The rate of mercury release was the lowest for amalgams based on a gas‐atomized alloy. The highest rate of mercury release, and also its dependence on time, was exhibited by lathe‐cut powder based amalgam. In addition to different volume fraction of the Ag‐Hg phase and the level of its tin alloying, this different behaviour may be explained by differences in the rate at which a layer of tin corrosion products acting as a barrier to mercury release is formed.     

氯碱生产中的腐蚀与防护

介绍了氯碱装置中介质的腐蚀特性、常用材料的耐腐蚀特性及应用实例。     

200m3液氨球罐裂纹成因分析

通过检验,从球罐的应力状态、球罐的金属材料和腐蚀介质等方面对200m3液氨球罐表面裂纹的形貌及产生裂纹的原因进行了分析,确定了球罐的裂纹是应力腐蚀裂纹,并对球罐进行了强度计算及安全评估。     

Corrosion failure of Zn–Al detonator housing

Some batches of detonator housings made up of Chromium plated Zn–Al alloy were found in an extensively cracked condition after few months of storage at room temperature. An analysis of the failure showed that the cracks were due to intergranular corrosion facilitated by segregation of lead at the grain boundaries. Improper chromium plating further aggravated the corrosion problem. This failure case emphasises the need for strict control of chemical composition for components made from Zn–Al alloy and the process of Cr plating of the components.     

劣化环丁砜再生技术的工业应用

为解决国内外环丁砜抽提芳烃工艺中环丁砜的劣化问题，在不添加单乙醇胺的前提下，采用阴离子交换树脂处理劣化的环丁砜，可使系统的pH值从3．4升到5．5左右，离子交换树脂需30d左右再生一次，降低了设备的腐蚀，减少了装置的堵塞，使系统运行稳定，取得了可观的社会效益和经济效益。     

2RE69/Zr702双金属管氨汽提塔关键部件的设计与制造

介绍了2RE69／Zr702双金属管的特殊结构、优良耐蚀性能，与管板的连接接头型式及焊接工艺、管头及液体分布器加工、装配和试验。     

制盐设备用不锈钢及复合板的选材

OOCr18Ni5Mo3Si2(以下简称18－5）属铁素体（α）－奥氏体（γ）双相不锈钢，具有良好的耐Cl^-点蚀和应力腐蚀性能，18－5不锈钢复合板因其兼备优良的使用性能和较低的制造成本，在制盐领域不锈钢材料中，是理想的选择。本就OOCr18Ni5Mo3Si2双相不锈钢及复合板的性能、特点以及在制盐领域的成功事例作一介绍。     

成品油储罐内的腐蚀及防护

对成品油储罐内各部位腐蚀情况进行了介绍，说明了产生腐蚀的原因和腐蚀机理。介绍了油罐内防护技术，采用节点加固，降低边缘应力，可减缓油罐金属腐蚀速度；对选用油罐内防腐涂料的原则进行了阐述。     

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川东北飞仙关组高含硫气藏气井在完井测试过程中，压力测点位置与产层中部的距离较大，需将压力数据用气柱压力计算公式折算后再进行试井分析解释。文章以质量、动量和能量三大守恒方程和状态方程为基础，考虑了流动气柱的动能损失以及井筒和地层中复杂的传热机理，推导出计算单相气流在井筒不同部位压力和温度的方法。以坡2井为例，应用目前最新的模块化动态地层测试器MDT地层测试技术，对折算的压力进行了验证和对比分析。结果表明，应用文中的压力计算方法，完全可以满足解释的压力数据精度。另外，在没有进行完井测试前利用MDT测压资料确定地层压力等储层参数是较为直接和可靠的方法。同时此法对川东北飞仙关组高含硫气藏的开发动态监测以控制元素硫在井底和井筒的沉积具有十分重要的指导意义。