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铜水体系电位-pH图与发电机内冷水pH调节防腐 被引量:28
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作者 谢学军 吕珂 +1 位作者 晏敏 潘玲 《腐蚀科学与防护技术》 CAS CSCD 北大核心 2007年第3期162-163,共2页
研究了铜水体系电位-pH之间的关系.结果表明,以10-6.2mol/L作为划分腐蚀发生与否的界限较合适,并据此作出了铜水体系的新的简化电位-pH图.
关键词 发电机内冷水 电位-ph 水质标准
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铁-水体系电位-pH图与氧化性水工况的腐蚀控制 被引量:8
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作者 谢学军 王浩 +1 位作者 邹品果 潘玲 《华北电力技术》 CAS 2011年第5期23-25,共3页
目前超临界直流炉大都采用氧化性水工况,要求给水中铁的含量小于10μg/L。为使超临界直流炉采用的氧化性水工况的腐蚀控制与铁-水体系的电位-pH图统一,不能再以10-6mol/L(即56μg/L)作为钢铁腐蚀与否的界限,而必须以10-6.75mol/L(即10μ... 目前超临界直流炉大都采用氧化性水工况,要求给水中铁的含量小于10μg/L。为使超临界直流炉采用的氧化性水工况的腐蚀控制与铁-水体系的电位-pH图统一,不能再以10-6mol/L(即56μg/L)作为钢铁腐蚀与否的界限,而必须以10-6.75mol/L(即10μg/L)作为腐蚀发生与否的界限,绘制铁-水体系的简化电位-pH平衡图时必须在平衡计算中将离子浓度均取10-6.75mol/L(即10μg/L)。 展开更多
关键词 氧化性水工况 -水体系 电位-ph
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Stress corrosion cracking behavior of PH13-8Mo stainless steel in Cl^- solutions 被引量:4
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作者 Qiang Yu Chao-fang Dong +3 位作者 Jian-xiong Liang Zhen-bao Liu Kui Xiao Xiao-gang Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第3期282-289,共8页
The stress corrosion cracking( SCC) behavior of PH13-8Mo precipitation hardening stainless steel( PHSS) in neutral NaCl solutions was investigated through slow-strain-rate tensile( SSRT) test at various applied ... The stress corrosion cracking( SCC) behavior of PH13-8Mo precipitation hardening stainless steel( PHSS) in neutral NaCl solutions was investigated through slow-strain-rate tensile( SSRT) test at various applied potentials. Fracture morphology,elongation ratio,and percentage reduction of area were measured to evaluate the SCC susceptibility. A critical concentration of 1. 0 mol / L neutral NaCl existed for SCC of PH13-8Mo steel. Significant SCC emerged when the applied potential was more negative than -0. 15 VSCE,and the SCC behavior was controlled by an anodic dissolution( AD) process.When the applied potential was lower than -0. 55 VSCE,an obvious hydrogen-fracture morphology was observed,which indicated that the SCC behavior was controlled by hydrogen-induced cracking( HIC).Between -0. 15 and -0. 35 VSCE,the applied potential exceeded the equilibrium hydrogen evolution potential in neutral NaCl solutions and the crack tips were of electrochemical origin in the anodic region; thus,the SCC process was dominated by the AD mechanism. 展开更多
关键词 Stress corrosion cracking ph13-8Mo precipitation hardening stainless steel Neutral NaCl solution Slow-strain-rate tensile test Applied potential
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Cu/CdcO_(3)catalysts for efficient electrochemical CO_(2)reduction over the wide potential window
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作者 Congwen Sun Jinhui Hao +7 位作者 Bing Wei Meng Wu Hong Liu Yusong Xiong Bochen Hu Longhua Li Min Chen Weidong Shi 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第12期323-327,共5页
High efficiency and low-cost catalyst-driven electrocatalytic CO_(2)reduction to CO production are of great significance for energy storage and development.The severe competitive hydrogen evolution reaction occurs at ... High efficiency and low-cost catalyst-driven electrocatalytic CO_(2)reduction to CO production are of great significance for energy storage and development.The severe competitive hydrogen evolution reaction occurs at large negative potential window limits the achievement of the target product from CO_(2)at high efficiency.Here,we successfully prepared Cu_(x)/CdcO_(3)composite catalyst rich in interfaces,in which achieved high CO Faraday eficiency exceeded 90%in a wide potential window of 700 mV and highest value up to 97.9%at-0.90V vs.RHE.The excellent performance can be ascribed to the positive contribution of Cu_(x)/CdcO_(3),which maintains a suitable high local pH value during electrochemical reduction,thus inhibiting the competitive hydrogen evolution reaction.Moreover,the compact structure between Cu and CdCO_(3)ensures fast electron transfer both inside catalysts and interface,thus speeding up the reaction kinetics of CO_(2)to CO conversion.Theoretically calculations further prove that the combination of Cu and CdcO_(3)provides the well-defined electronic structure for intermediates adsorption,significantly reducing the reaction barrier for the formation of co.This work provides new insights into the design of eficient electrochemical CO_(2)reduction catalysts for inhibiting hydrogen evolution by adjusting the local pH effect. 展开更多
关键词 OH^(-) Local ph Inhibition of hydrogen evolution CO Wide potential window
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