Corrosion Communications最新文献

{"title":"On electrochemical corrosion of mechano-activated and thermally processed AlxCryNiz 2D decagonal quasicrystalline structures and crystalline approximants","authors":"Meysam Amini , Seyed Ali Tayebifard , Irandokht Jahanian Bahnemiri","doi":"10.1016/j.corcom.2024.06.001","DOIUrl":"10.1016/j.corcom.2024.06.001","url":null,"abstract":"<div><div>This article represents a pioneering study centered on the corrosion kinetics of untreated and thermally processed mechano-synthesized Al<em><sub>x</sub></em>Cr<em><sub>y</sub></em>Ni<em><sub>z</sub></em> two-dimensional decagonal quasicrystalline structure and crystalline approximants. It sheds light on the distinguished corrosion behavior of untreated and heat-treated mechano-synthesized Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> and Al<sub>86</sub>Cr<sub>12</sub>Ni<sub>2</sub> alloys, including a wide diversity of miscellaneous intermetallic phases. A comprehensive characterization was performed to analyze crystallographic structure and thermal characteristics of Al<em><sub>x</sub></em>Cr<em><sub>y</sub></em>Ni<em><sub>z</sub></em> powder particles. Electrochemical evaluations of the mechano-synthesized Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> and Al<sub>86</sub>Cr<sub>12</sub>Ni<sub>2</sub> specimens and their heat-treated counterparts were conducted under cyclic potentiodynamic polarization tests with 0.1 mol/L Na<sub>2</sub>SO<sub>4</sub> (pH=2) and 3.5 % NaCl (pH=8.5) electrolytes at room temperature, respectively. Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> two-dimensional decagonal quasicrystalline phase was attained following 6 h mechano-synthesis and subsequent annealing treatment at 1035 °C. There is no evidence of quasicrystal formation in the Al<sub>86</sub>Cr<sub>12</sub>Ni<sub>2</sub> alloy system after 6 h mechano-synthesis and successive thermal processing at 445 and 570 °C. In this study, we conducted the first investigation into electrochemical performance of both Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> and Al<sub>86</sub>Cr<sub>12</sub>Ni<sub>2</sub> intermetallics. Both Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> and Al<sub>86</sub>Cr<sub>12</sub>Ni<sub>2</sub> alloys develop a protective passive film in 0.1 mol/L Na<sub>2</sub>SO<sub>4</sub> electrolyte. It was determined that 6 h mechano-synthesized Al<sub>72</sub>Cr<sub>15</sub>Ni<sub>13</sub> sample, subjected to annealing at 1035 °C, stands out in the Al-Cr-Ni alloy systems for applications necessitating exceptional corrosion resistance, passivation behavior, and minimal susceptibility to pitting corrosion when compared to other tested counterparts. This alloy is characterized by a corrosion current density of 3.73 µA/cm<sup>2</sup> and a corrosion potential of -0.16 V(vs. Ag/AgCl), revealing a remarkably stable passive film up to a current density of 0.02 A/cm<sup>2</sup> and a potential of 2.41 V (vs. Ag/AgCl) within 0.1 mol/L Na<sub>2</sub>SO<sub>4</sub> medium. Likewise, it exhibited a drastically diminished corrosion current density of 11.65 µA/cm<sup>2</sup> and a reduced corrosion potential of -0.27 V (vs. Ag/AgCl) within 3.5 % NaCl electrolyte, attributed to the formation of two-dimensional decagonal quasicrystalline phase and hexagonal <em>δ</em>-Al<sub>3</sub>Ni<sub>2</sub> crystalline approximant at 1035 °C. It also encompassed a r","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 44-56"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen-driven de-alloying of Fe-14Cr-12Ni-10Mn-3Cu-2.5Al-1Nb austenitic steel at 500 °C in static Pb-Bi eutectic with concentration of dissolved oxygen alternating from ∼10-6 to 10-9 mass% for 10000 h","authors":"Valentyn Tsisar ,&nbsp;Erich Stergar ,&nbsp;Serguei Gavrilov ,&nbsp;Eloa Lopes Maia ,&nbsp;Wouter Van Renterghem ,&nbsp;Pierre Louette ,&nbsp;Stéphane Lucas","doi":"10.1016/j.corcom.2024.01.002","DOIUrl":"10.1016/j.corcom.2024.01.002","url":null,"abstract":"<div><div>A high-Mn austenitic steel Fe-14Cr-12Ni-10Mn-3Cu-2.5Al-1Nb was tested at 500 °C in static Pb-Bi eutectic for 10000 h. In the course of the test, oxygen concentration in liquid metal was cycled from ∼10^-6 to ∼10^-9 mass%, which provides oxidation and dissolution regimes, respectively. After 10000 h exposure steel showed formation of ferrite corrosion zone depleted in Mn, Ni, Cu, Cr, Fe and penetrated by Pb and Bi. Average depth of corrosion is 15±5 µm, while maximum corrosion depth locally reaches ∼35 µm. Dissolved Mn and Cr re-precipitated in the vicinity of steel surface in a form of stratified Mn-O/Cr-Mn-O oxide scale. Obtained results were compared to those of similar Al-alloyed austenitic steels with lower Mn content, which exhibited protective oxidation under same test conditions. The phenomenological mechanism of oxygen-driven de-alloying of steel in Pb-Bi[O] is discussed.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 1-11"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of ultrasonic treatment and current pulse frequency on properties of micro-arc oxidation coating on Mg alloy LAZ931","authors":"Yishun Tian ,&nbsp;Di Mei ,&nbsp;Zhipeng Liu ,&nbsp;Shuhao Xu ,&nbsp;Jiayin Zhao ,&nbsp;Haitao Xie ,&nbsp;Jinxue Liu ,&nbsp;Yang Xiao ,&nbsp;Shijie Zhu ,&nbsp;Shaokang Guan","doi":"10.1016/j.corcom.2024.01.003","DOIUrl":"10.1016/j.corcom.2024.01.003","url":null,"abstract":"<div><div>To enhance corrosion resistance of magnesium-lithium (Mg-Li) alloy LAZ931 in corrosive environments, a micro-arc oxidation (MAO) based surface treatment was carried out under a unipolar pulsed power supply. Effects of ultrasonic treatment and current pulse frequency on the performance of MAO coatings were investigated using scanning electron microscopy, electrochemical characterization, and friction wear tests. Results demonstrate that ultrasonic treatment greatly reduced the number density of micro-defects in the resulting MAO coatings and improved their overall performance. Corrosion and wear resistance of the MAO coating increased when current pulse frequency increased from 400 to 2000 Hz. Those findings are beneficial for improving the performance of MAO on Mg-Li alloys through optimizing the processing parameters.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 77-86"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of friction stir processing (FSP) on arc directed energy deposited 316 L stainless steel: A corrosion science study","authors":"Khashayar Morshed-Behbahani ,&nbsp;Amir Hadadzadeh ,&nbsp;Adrian Gerlich ,&nbsp;Ali Nasiri","doi":"10.1016/j.corcom.2023.12.001","DOIUrl":"10.1016/j.corcom.2023.12.001","url":null,"abstract":"<div><div>Friction stir processing (FSP) was employed as a post-printing surface modification technique to enhance surface properties of arc-directed energy deposited 316 L austenitic stainless-steel parts. Corrosion properties and passivity of stir zone and base metal were investigated in 3.5 wt.% NaCl solution. Results reveal a gradual improvement in corrosion protection ability of formed passive film on the alloy's surface over time. Specifically, FSPed region exhibited superior passive behavior and uniform corrosion resistance compared to base metal. This improvement was attributed to a more homogeneous microstructure of stir zone, which hindered micro-galvanic coupling effect. However, it was observed that FSP-treatment did not effectively impede the propagation of pitting corrosion.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 24-27"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling the local stress corrosion cracking behavior of Alloy 690 plug in a high-temperature concentrated alkaline solution","authors":"Baoliang Cheng ,&nbsp;Jin Tao ,&nbsp;Jingshan Deng ,&nbsp;Botao Xu ,&nbsp;Xinhe Xu ,&nbsp;Songhan Nie ,&nbsp;Tongming Cui ,&nbsp;Junjie Chen ,&nbsp;Zhanpeng Lu","doi":"10.1016/j.corcom.2024.12.001","DOIUrl":"10.1016/j.corcom.2024.12.001","url":null,"abstract":"<div><div>The stress corrosion cracking (SCC) performance of the sealed Alloy 690 plugs was investigated in 350 °C deoxygenated concentrated alkaline solution. Sealing was used to expose only the inner surface of the plug, preventing direct contact between the tube sheet and the concentrated alkaline solution. After exposure for 1000 h, several intergranular cracks were observed on the inner wall of the plugs. Stress corrosion cracks primarily appear in some regions on the inner wall, which are highly deformed and advanced along the random grain boundary. The internal oxide layer formed in the high-temperature alkaline solution was not dense; it comprised a composite oxide with multiple layers. The outermost layer consisted of Fe-Cr-Ni oxide particles, and beneath it was an uneven Ni-rich layer, followed by a thin Cr-rich layer closest to the matrix. High kernel average misorientation in the heavily deformed region and a lack of chromium carbide contributed to crack initiation and propagation of Alloy 690 plug in hot concentrated alkaline solutions.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 12-23"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cellular automata modeling on uniform corrosion behavior of solid copper in gallium-based liquid metals","authors":"Yujie Ding ,&nbsp;Yuntao Cui ,&nbsp;Wei Rao ,&nbsp;Jing Liu","doi":"10.1016/j.corcom.2024.02.004","DOIUrl":"10.1016/j.corcom.2024.02.004","url":null,"abstract":"<div><div>A two-dimensional cellular automata model is developed to investigate the uniform corrosion of copper substrate covered by gallium-based liquid metals. A set of transformation rules are defined to describe reaction mechanism with Ga concentration gradient as a threshold. A random walk process is used to simulate diffusion of gallium atoms based on Margolus neighbors. Through comparing with short-term and long-term corrosion test data, the model shows high accuracy in describing diffusion of gallium and formation of multi-layered intermetallic compounds. Sensitivity analysis points out that growth rate of corrosion layers is mainly determined by gallium mass fraction in liquid metal and diffusion probability in Cu. The corrosion layer thickness over time follows the parabolic curve <span><math><mrow><mi>δ</mi><mo>∼</mo><msup><mi>t</mi><mrow><mn>0.5</mn></mrow></msup></mrow></math></span>, and the fitting parameter is mainly determined by alloy compositions.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"17 ","pages":"Pages 66-76"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High temperature oxidation behavior of γʹ-strengthened CoNi-base superalloys","authors":"Yingju Li ,&nbsp;Shasha Qu ,&nbsp;Tianyu Liu ,&nbsp;Bingyu Lu ,&nbsp;Xiaohui Feng ,&nbsp;Yuansheng Yang","doi":"10.1016/j.corcom.2023.11.005","DOIUrl":"10.1016/j.corcom.2023.11.005","url":null,"abstract":"<div><div>Oxidation behavior of <em>γ</em>ʹ-strengthened CoNi-base superalloys was investigated with isothermal oxidation tests conducted in air at 800 and 900 °C, respectively, for 100 h. It is observed that both 30Ni-10Al-4W-4Ti-2Ta (4W2Ta) and 30Ni-10Al-5W-4Ti-1Ta (5W1Ta) alloys exhibit a three-layered oxide scale structure after oxidation. Addition of Ta increases oxidation mass gain of CoNi-based high-temperature alloys, but the effects on the type and distribution of oxidation products are not significant. However, the oxidation temperature has a great influence on oxide surface morphology and oxidation mechanisms for those two alloys. After oxidation at 800 °C, the outermost oxide film contains Co₃O₄, CoO, and NiO, and when the oxidation temperature is 900 °C, the outermost oxide film contains only CoO.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"16 ","pages":"Pages 61-70"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of dissolved oxygen on the corrosion-related unidentified deposit formed of 304 SS in the flow accelerated zone under the simulated secondary water chemistry","authors":"","doi":"10.1016/j.corcom.2024.02.001","DOIUrl":"10.1016/j.corcom.2024.02.001","url":null,"abstract":"<div><p>Effects of dissolved oxygen (DO) on the deposition characteristics of corrosion-related unidentified deposit (CRUD) were investigated by using 304 stainless steel micro-orifices. The main results indicate that the change of DO concentration resulted in a change of the composition of the outermost deposition layer. The DO concentration amplifies/diminishes the porosity in CRUD effect by changing the rate of ion transport. Meanwhile, the electrokinetic effect is weakened by the decrease of the thickness of the electric double layer, which is caused by the dissolution of Cr ions increased by increasing the DO concentration. Meanwhile, the chromium ion concentration increases with the dissolved oxygen concentration, which leads to a decrease in the thickness of the electric double layer, weakening the electrodynamic effect. The above results in the thickness and width of CRUD in the flow acceleration zone vary in varying degrees. This suggests that the deposition process of CRUD occurs under the mechanism of mass transfer and electrokinetic mechanism.</p></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"16 ","pages":"Pages 14-23"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667266924000227/pdfft?md5=15db6b30ddbb71cc81a8cb8abcd3192b&pid=1-s2.0-S2667266924000227-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141134951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of pre-strain on hydrogen-induced stress corrosion cracking behavior of Q345R steel in hydrofluoric acid vapor environment","authors":"Hailong Dai ,&nbsp;Jiahui Tang ,&nbsp;Shouwen Shi ,&nbsp;Zhe Zhang ,&nbsp;Xu Chen","doi":"10.1016/j.corcom.2023.11.004","DOIUrl":"10.1016/j.corcom.2023.11.004","url":null,"abstract":"<div><div>This study investigates microstructure, hydrogen diffusion properties, and stress corrosion cracking (SCC) behavior of Q345R steel subject to pre-applied strains of 1 %, 3 %, and 5 %. The relationship between microstructure and SCC susceptibility in hydrofluoric acid (HF) vapor is examined. It is found that pre-strain cannot change the microstructure of Q345R steel but increases dislocation density. The increasing SCC sensitivity of Q345R steel in HF vapor is associated with the dislocation density induced by pre-strain. With increasing pre-strain, dislocation density and reversible hydrogen trap increase, and interaction between hydrogen and dislocation accelerates hydrogen-induced SCC. In addition, irreversible hydrogen traps caused by high pre-strain can severely aggravate hydrogen-induced SCC, resulting in high SCC vulnerability.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"16 ","pages":"Pages 71-80"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atmospheric corrosion of tin coating on T2 copper in Xiangtan, China","authors":"Jun Wang ,&nbsp;Xiaobao Zhou ,&nbsp;Yi Xie ,&nbsp;Song Xu ,&nbsp;Zelun Ouyang ,&nbsp;Xuankai Wang ,&nbsp;Dengke Li ,&nbsp;Cong Li ,&nbsp;Tangqing Wu","doi":"10.1016/j.corcom.2024.02.002","DOIUrl":"10.1016/j.corcom.2024.02.002","url":null,"abstract":"<div><div>Atmospheric corrosion of tin coating on copper was explored to understand the differences in corrosion behavior between the skyward and earthward surfaces of the tin coating. Results show that average corrosion rate of the tin coating was 0.578 ± 0.051 and 1.137 ± 0.166 µm·y⁻¹ after one year and two years of exposure in Xiangtan, China, respectively. Corrosion rate of the tin coating during the second year of exposure was higher than that during the first year. SnO₂ was the main corrosion product of the tin coating. Localized corrosion vulnerabilty of the skyward surface was higher than that of the earthward surface during the first year of exposure, but it became lower than the latter during the second year. During the first year of exposure, <em>i</em>_corr values of the skyward and earthward surfaces were relatively low, but they sharply increased during the second year of exposure.</div></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"16 ","pages":"Pages 52-60"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}