低铬抗硫套管的H2S/CO2腐蚀行为研究

通过高温高压及H2S应力腐蚀开裂(SSC)实验,采用SEM、EDS、XRD和TEM技术,研究3Cr110S在模拟环境中的H2S/CO2腐蚀行为。结果表明:在模拟H2S/CO2高温高压腐蚀环境中,H2S腐蚀占主导作用,3Cr110S的均匀腐蚀速率为0.1272 mm/a,局部腐蚀轻微,试样表面腐蚀产物为FeS;在施加应力为72%、80%的最低屈服强度时,3Cr110S试样均未发生应力腐蚀开裂,具有良好的抗SSC性能;3Cr110S回火索氏体组织的条束之间位相差大,铬元素在晶界及晶内以粒状碳化物析出、位错纠结、弥散分布碳化物的位错定扎对SSC裂纹扩展起着良好的阻碍作用。     

高韧性抗H2S腐蚀管线钢试验研究

Experimental Study of High Toughness H2 SCorrosionResistant Pipeline SteelMo Demin( Science and Technology Departmentof Wuyang lron and Steel Co.Ltd)　　本研究的目的在于研制开发抗酸气腐蚀最低强度指标是 70 ksi(485MPa)的高韧性管线钢。降低 50℃左右。由于热轧、控制轧制的钢中均含大量的自由氮 ,因此要求母材上氮含量尽可能图 1　不同强化机理对转变温度的作用适 ,均匀分布的 ,这两者都是通过降低 Ti N形成的溶解性 ,见图 5。图 5表明 :1 1 50℃下碳含量为0.1 0 % (未加入 Ti)的传统管线钢中钢中铌的相对溶　　…     

BT80SS抗H2S腐蚀石油套管的研制

根据化学元素对H2S应力腐蚀的影响,选用C,Mn,Cr和Mo为合金元素,控制S和P等有害元素的含量,同时加入RE;根据钢管的组织对抗H2S应力腐蚀的影响,采用淬火后高温回火的热处理制度,生产出了具有自主知识产权的抗H2S套管,该产品具有良好的耐H2S腐蚀性能。     

CO2分压对油管钢CO2/H2S腐蚀的影响

采用高温高压釜、失重法和扫描电镜，对不同CO2分压(310．2642、930．7926、1551．3210、2171．8494kPa)条件下油管钢N80和P110的CO2／H2S腐蚀进行了研究。结果表明，随着CO2分压的升高，两种钢的CO2／H2S腐蚀速率均单调增加；除了CO2分压极低的情况以外，P110钢的腐蚀速率总是大于N80钢。     

抗H2S腐蚀钢板的失效机理研究

针对抗H2S腐蚀钢板（质量分数/%:0.16C,0.32Si,1.25Mn,0.018AI,0.000 7S,0.007P）在失效过程的关键影响因素进行分析,通过对比夹杂物和带状组织对H₂S腐蚀（HIC）性能的影响,阐明了H2S腐蚀失效机理以及改善抗H₂S腐蚀性能的方法。结果表明,MnS夹杂物和连续的带状组织是导致H₂S腐蚀裂纹的关键因素,通过两次880℃保温60 min正火处理,可使带状组织由连续变为断续,抗HIC性能会明显改善,长度裂纹敏感率为0     

超级13Cr在H2S和CO2共存环境下的腐蚀行为影响研究

对CO2和H2S共存环境中95 ksi钢级超级13Cr钢的腐蚀行为进行了研究,发现常温条件下H2S和CO2共存环境中,无论是采用恒载荷的方法还是四点弯曲的方法,都在试样的表面出现了局部腐蚀,而在高温条件下未发生点蚀和应力腐蚀现象。分析结果表明,95 ksi钢级的超级马氏体不锈钢在常温H2S和CO2共存环境中出现的局部腐蚀主要是因为夹杂物在应力集中和酸性溶液的作用下形成点蚀,并沿着相同应力水平的区域扩展,局部腐蚀增加了应力腐蚀开裂的敏感性。     

塞尔维亚波尔州TMK铜金矿H2S气体成因分析

矿区铜金矿井巷开拓系统施工过程中,井下涌水出现含有臭鸡蛋气味气体现象后,作者随即开展了矿区地表、巷道、钻孔岩心含(隔)水性等的水文地质特征调查,在认真阅读了相关技术文献资料,反复分析比对矿区地表水、基岩构造裂隙水、巷道涌水、相邻矿区涌水的水化学类型特征及H2S气体空间赋存位置等工作的基础上,提出了矿区H2S气体系岩浆成...     

硫化锌精矿加压浸出时H2S的生成及影响

分析了硫化锌精矿加压浸出过程中H2S的生成,并结合试验中所发现的现象阐明了H2S生成对钛质加压釜体的腐蚀作用,提出了腐蚀机理,在此基础上提出了钛质加压釜安全操作的原则。     

Corrosion Behavior of 110S Tube Steel in Environments of High H2S and CO2 Content

 The corrosion behavior of the 110S tube steel in the environments of high H2S and CO2 content was investigated by using a high-temperature and high-pressure autoclave, and the corrosion products were characterized by scanning electron microscopy and X-ray diffraction technique. The results showed that all of the corrosion products under the test conditions mainly consisted of different types of iron sulfides such as pyrrhotite of Fe0. 95S, mackinawite of FeS0. 9, Fe0. 985S and FeS, and the absence of iron carbonate in the corrosion scales indicated that the corrosion process was controlled by H2S corrosion. The corrosion rate of the 110S steel decreased firstly and then increased with the rising of temperature. The minimum corrosion rate occurred at 110 ℃. When the H2S partial pressure PH2S below 9 MPa, the corrosion rate declined with the increase of PH2S. While over 9 MPa, a higher PH2S resulted in a faster corrosion process. With the increasing of the CO2 partial pressure, the corrosion rate had an increasing trend. The morphologies of the corrosion scales had a good accordance with the corrosion rates.     

螺旋焊管抗H2S应力腐蚀试验研究

通过对螺旋焊管抗H2S应力腐蚀的试验研究，提出了螺旋焊管抗H2S应力腐蚀的几种途径，并对我国在抗H2S应力腐蚀的研究方面提出了一些建议。     

Influence of Chromium on Mechanical Properties and CO2/H2S Corrosion Behavior of P110 Grade Tube Steel

Four kinds of P110 grade tube steels containing different chromium contents were designed to probe the in- fluence of Cr on the properties of tube steel. The microstrueture, mechanical properties and corrosion behavior of the four kinds of P110 grade tube steels were studied deeply and thoroughly. The analysis of the mechanical properties indicated that tensile strength and yield strength of the steel plates were improved, while transverse and longitudinal impact energy and elongation first increased and then decreased when Cr content rose. The impact energy and elonga tion reached the peak when Cr content was 1 ~. Cr precipitates were found only in 3 ~ Cr steel, with （Nb, Ti）（C, N） or Nb（C,N） as the core of precipitation and then grew up. The corrosion experiments demonstrated that the scales on the four steels had a two layer structure under the corrosion of CO2 and H2 S. The outer layer was mainly com- posed of FeS or FeS1 x and the inner layer consisted of FeCOa and Cr compounds. Cr was rich in the inner layer and the Cr content of the inner layer increased with the Cr content in matrix. The enriched Cr enhanced the compactness of the scales, further hindering the diffusion of ions from liquid to the surface of steel, thus reducing corrosion rate.     

Low-Temperature Nitrocarburizing of Austenitic Stainless Steel for Combat Corrosion in H2S Environments

Metallurgical and Materials Transactions A - The time-dependent experiment was performed to investigate the corrosion behavior of low-temperature liquid nitrocarburized (LNC) 304 austenitic...     

“pu—1”抗H2S腐蚀钻材钢CCT曲线的测定及应用

利用Ｆｏｒｍａｓｔｏｒ－Ｆ全自动相变测定仪，测定抗Ｈ２Ｓ腐蚀钻材“ｐｕ－１”钢，获得此种钢的ＣＣＴ曲线；证明依据该曲线所制定钢的热处理工艺，所获金相显微结构组织的抗Ｈ２Ｓ腐蚀性能最佳。