检索结果-南通市图书馆

Effect of Sulfate Reduced Bacterium on Corrosion Behavior of 10CrMoAl Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2007年第1期14卷 74-78页

作者： WANG Hua liang cheng-hao School of Chemical Engineering Dalian University of Technology Dalian 116012 Liaoning China Eleetromeehanics and Materials Engineering College Dalian Maritime University Dalian 116026 Liaoning China

The effects of sulfate reduced bacterium （SRB） on the corrosion behavior of 10CrMoAl steel in seawater were studied by chemical immersion, potentiodynamic polarization, electrochemical impedance spectroscopy measurement, and scanning electron microscope techniques. The results show that the content of element sulfur in the corrosion product of 10CrMoAl steel in seawater with SRB is up to 9. 23 %, which is higher than that of the same in sterile seawater. X-ray diffraction demonstrates that the main corrosion product is FeS. SRB increases the corrosion rate by anodic depolarization of the metabolized sulfide product. SEM observation indicates that the corrosion product is not distributed continuously; in addition, bacilliform sulfate-reduced bacterium accumulates on the local surface of 10CrMoAl steel. Hence, SRB enhances sensitivity to the localized corrosion of 10CrMoAl steel in seawater.

关键词： sulfate reduced bacterium 10CrMoAl steel localized corrosion

Prediction of Pitting Corrosion Mass Loss for 304 Stainless Steel by Image Processing and BP Neural Network

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2005年第6期12卷 59-62页

作者： ZHANG Wei liang cheng-hao State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012 China

Image processing technique was employed to analyze pitting corrosion morphologies of 304 stainless steel exposed to FeCl3 environments. BP neural network models were developed for the prediction of pitting corrosion mass loss using the obtained data of the total and the average pit areas which were extracted from pitting binary image. The results showed that the predicted results obtained by the 2-5-1 type BP neural network model are in good agreement with the experimental data of pitting corrosion mass loss. The maximum relative error of prediction is 6.78%.

关键词： BP neural network image processing pitting corrosion mass loss prediction

Inhibition Performance of Enhanced-Mo Inhibitor for Carbon Steel in 55% LiBr Solution

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2008年第1期15卷 49-54页

作者： liang cheng-hao HU Xian-qi Electromechanics and Materials Engineering College Dalian Maritime University Dalian 116026 Liaoning China School of Chemical Engineering Dalian University of Technology Dalian 116012 Liaoning China

The inhibition performance of enhanced-Mo inhibitor for carbon steel in 55% LiBr solution was measured by means of chemical immersion,electrochemical measurements,and physical detection *** indicated that enhanced-Mo inhibitor showed excellent inhibition performance of carbon steel in 55% LiBr solution,especially at high *** increasing the temperature of solution from 160 ℃ to 240 ℃,the corrosion rates of carbon steel increased from 17.67 μm/a to 33.07 μm/***-Mo inhibitor might improve the anodic polarization performance of carbon steel and widen the passive potential region of carbon steel in 55% LiBr ***-Mo inhibitor belongs to anodic *** 55% LiBr solution,the relationship between corrosion current density icorr and corrosion potential Ecorr of carbon steel accorded with the equation lgicorr=-2.66-3.54Ecorr,and the value of cathodic Tafel constant βc for the H2 reaction was 282 *** 55% LiBr solution contained enhanced-Mo inhibitor,a passive film comprising Fe3O4 and MoO2 was formed on the carbon steel surface by electrochemical *** corrosion of carbon steel might be retarded by this protective film,and the anticorrosion performance of carbon steel in 55% LiBr solution might be improved by enhanced-Mo inhibitor.

关键词： corrosion enhanced-Mo inhibitor carbon steel

Anticorrosion Performance of Carbon Steel in 55% LiBr Solution Containing PMA/SbBr_3 Inhibitor

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2006年第4期13卷 56-60页

作者： HU Xian-qi liang cheng-hao HUANG Nai-bao School of Chemical Engineering Dalian University of Technology Dalian 116012 Liaoning China Electromechanics and Materials Engineering College Dalian Maritime University Dalian 116026 Liaoning China

The anticorrosion performance of carbon steel in 55 % LiBr solution containing PMA/SbBr3 inhibitor was studied by weight-loss tests, electrochemical measurements and surface analysis. In 55 %LiBr＋PMA/SbBr3 solution, corrosion rates of carbon steel at 145 ℃, 175℃, 190℃ and 240℃ are 18.32μm·a^-1 , 27.68μm·a^-1, 53.58μm·a^-1 and 73. 78μm·a^-1 , respectively. PMA/SbBr3 inhibitor may inhibit the corrosion of carbon steel in 55% LiBr solution effectively. Especially, it shows an excellent corrosion inhibition performance at high temperature. Both anodic and cathodic reactions of carbon steel may be inhibited by PMA/SbBr3 inhibitor, so it may be classified as mixed inhibitor. In 55%LiBr＋PMA/SbBr3 solution, the apparent activation energy of the corrosion reaction of carbon steel is 29. 61 kJ·mol^-1. The corrosion inhibition mechanism of PMA/SbBr3 is suggested as follows： PMA has the effect of inhibiting hydrogen evolution and a strong oxidizing property; Sb^3＋ also exhibits oxidizing properties, and can exist stably with PMA in LiBr solutions; the passive film comprising Fe2O3 and antimony formed on carbon steel surface may prevent Brfrom diffusing into the metal surface due to the synergistic effect of PMA and Sb^3＋ ; As a result, the anticorrosion performance of carbon steel may be improved by PMA/SbBr3 inhibitor in 55% LiBr solution.

关键词： carbon steel lithium bromide corrosion inhibitor

在线全文

学校读者我要写书评

暂无评论

人工模拟体液中离子注氮工业纯钛腐蚀行为

大连理工大学学报 2000年第4期40卷 434-436页

作者：梁成浩郭亮大连理工大学化工学院辽宁大连116012

采用电化学技术研究了人工模拟体液中离子注氮对人体医用金属材料工业纯钛的耐蚀性的影响 .腐蚀电位和阳极极化曲线表明 ,离子注氮明显提高了材料的耐蚀性 .X射线衍射与AES分析发现材料表面形成钛的氮化物膜层。

关键词：离子注入人工模拟体液工业纯钛腐蚀行为

在线全文

学校读者我要写书评

暂无评论

高纯铝阳极氧化膜的电化学行为研究

材料科学与工艺 2011年第1期19卷 52-57页

作者：梁成浩梁坤黄乃宝大连海事大学交通与物流工程学院辽宁116026 大连理工大学化工学院辽宁116012

为考察氧化膜状态对其电化学性能的影响,采用电化学方法研究了高纯铝阳极氧化膜在磷酸二氢钠缓冲溶液中的电化学性能.测试结果表明,高纯铝氧化膜的阴极极化过程分为3个阶段:1)电流密度变化较小而电位迅速负移,系克服氧化膜阻挡层电阻阶... 详细信息

为考察氧化膜状态对其电化学性能的影响,采用电化学方法研究了高纯铝阳极氧化膜在磷酸二氢钠缓冲溶液中的电化学性能.测试结果表明,高纯铝氧化膜的阴极极化过程分为3个阶段:1)电流密度变化较小而电位迅速负移,系克服氧化膜阻挡层电阻阶段;2)电流密度迅速增大而电位变化较小的析氢阶段;3)电流密度变化较小而电位迅速负移的氢离子扩散控制阶段.氧化膜具有单向导通性质,其阻抗大小由阻挡层决定,阻挡层愈厚,氧化膜的阻抗愈大.氧化电压与阻挡层的厚度成正比,在硫酸、草酸和磷酸溶液中阻挡层的成长率约为1 nm/V.

关键词：高纯铝阳极氧化膜电化学性能

DETERMINATION OF SENSITIZATION IN AUSTENITIC STAINLESS STEEL

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1993年第11期4卷 993-994页

作者： Quan Sheng WU, Wei HE, Chang Yi LIU, Xiao liang cheng, Shen hao CHEN Department of Chemistry, Shandong University, Jinan, 250100

The electrochemical potentiokinetic reactivation technique(EPR) and the potentiostatic pulse technique(PPT) have been used to detect sensitization of austenitic stainless steel. Compared with EPR, PPT has some advantages such as it can be conducted at greater speed and with less destruction, etc. The sensitivity of PPT can be improved by altering t_1/t_2 in a certain range and it will favour the detection of the specimen with lower degree of sensitization.

关键词： EPR DOS DETERMINATION OF SENSITIZATION IN AUSTENITIC STAINLESS STEEL Chen than

不锈钢载波氧化膜/聚噻吩复合膜的制备及耐蚀性能研究

在线全文

学校读者我要写书评

暂无评论

材料工程 2013年第1期41卷 73-78页

作者：梁成浩陈婉黄乃宝大连海事大学交通运输装备与海洋工程学院辽宁大连116026 大连理工大学化工学院辽宁大连116023

采用红外光谱、扫描电镜与原子力显微镜表征了304不锈钢载波氧化膜/聚噻吩复合膜,通过电化学测试技术考察了复合膜的耐蚀性能。结果表明:通过载波钝化后在304不锈钢氧化膜上电沉积聚噻吩(PTH)膜,制备了304SS/氧化膜/PTH的复合膜,膜层致... 详细信息

采用红外光谱、扫描电镜与原子力显微镜表征了304不锈钢载波氧化膜/聚噻吩复合膜,通过电化学测试技术考察了复合膜的耐蚀性能。结果表明:通过载波钝化后在304不锈钢氧化膜上电沉积聚噻吩(PTH)膜,制备了304SS/氧化膜/PTH的复合膜,膜层致密。复合膜中的PTH层的分子结构按α-α′规则连接,并具有良好的电化学氧化还原可逆性。复合膜的电导率在5～10S/cm的范围内。304SS/PTH和304SS/AV800/PTH,304SS/AV1020/PTH复合膜的界面结合强度分别为0.81,4.98MPa和5.10MPa。在1M H2SO4溶液中耐蚀性能测试结果,两种复合膜的腐蚀电位正移0.80V,使304不锈钢基体保持在钝化状态,抑制了304不锈钢基体的阳极活性溶解,提高了耐蚀性能。比较而言,由于304SS/AV1020表面多孔性与PTH膜形成多孔氧化物的嵌合层,使得304SS/AV1020/PTH复合膜的电化学、电学及界面结合强度均优于304SS/AV800/PTH复合膜。

关键词： 304不锈钢电化学合成聚噻吩复合膜耐蚀性能

AZ91D镁合金植酸转化膜组成与耐蚀性能研究

在线全文

学校读者我要写书评

暂无评论

大连理工大学学报 2006年第1期46卷 16-19页

作者：郑润芬梁成浩邵林大连理工大学化工学院辽宁大连116012

采用一种环保型金属处理剂植酸对AZ91D镁合金进行化学转化处理,并通过电化学测试技术和化学浸泡方法考查其耐蚀性能.结果表明,经植酸处理后,与传统的铬酸盐制品相比,在室温模拟汗液中,AZ91D镁合金的腐蚀电位从-1.6 V提高到-1.2 V(SCE);... 详细信息

采用一种环保型金属处理剂植酸对AZ91D镁合金进行化学转化处理,并通过电化学测试技术和化学浸泡方法考查其耐蚀性能.结果表明,经植酸处理后,与传统的铬酸盐制品相比,在室温模拟汗液中,AZ91D镁合金的腐蚀电位从-1.6 V提高到-1.2 V(SCE);在相同电位下,阳极极化电流密度减小5个数量级,电化学性能得到显著改善.涂覆聚丙烯酸树脂后,在模拟汗液中浸泡72 h没有观察到腐蚀迹象.根据扫描电镜观察、电子能谱分析和衰减全反射红外光谱测试结果,发现植酸在镁合金表面发生化学吸附,以植酸盐的形式在合金表面形成一层致密的、具有网状裂纹的转化膜.该转化膜能够有效地阻止浸蚀性阴离子与金属基体接触,从而提高了镁合金的耐蚀性能.

关键词： AZ91D镁合金植酸化学转化耐蚀性能