Anti-corrosion Methods and Materials最新文献_第8页

New understanding on the critical factors determining stability of passive film on Fe-Cr alloy based on aberration-corrected TEM study 基于像差校正 TEM 研究的铁铬合金被动膜稳定性关键因素新认识

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-12-11 DOI: 10.1108/acmm-09-2023-2891

B. Zhang, X.X. Wei, X.L. Ma

Purpose

In recent years, using aberration-corrected transmission electron microscopy, the authors have achieved precisely detecting the structural evolution of passive film as well as its interface zone at atomic scale. The purpose of this paper aims to make a brief review to show the authors’ new understanding and perspective on the issue of critical factors determining stability of passive film of Fe-Cr alloy.

Design/methodology/approach

The introduction of single crystal enabled the authors to obtain a distinct metal/passive film interface and better characterize the structure of the interface region. The authors use aberration-corrected TEM to conduct cross-sectional observation and directly capture the details across the entire film at a high spatial and energy resolution.

Findings

Apart from the passive film itself, the interface zone, including metal/film (Me/F) interface and the adjacent metal side, is also the site which is attacked. Accordingly, the nature of the interface zone, such as microstructure, composition and atomic configuration, is one of the critical factors determining the stability of passive film.

Originality/value

Deciphering the critical factors determining the stability of passive film is of great significance and has been a fundamental issue in corrosion science. Great attention has been paid to the nature of the passive film itself. In contrast, the possible role of the interface between the passive film and the metal is rarely taken into account. Based on the advanced analytical tool with high spatial resolution, the authors have specified the significant role of interface structures on the macro-scale stability of passive film.

目的近年来，作者利用像差校正透射电子显微镜，在原子尺度上实现了对被动膜结构演变及其界面区的精确检测。本文旨在对决定铁铬合金被动膜稳定性的关键因素这一问题进行简要评述，以展示作者对这一问题的新理解和新观点。设计/方法/途径单晶的引入使作者能够获得清晰的金属/被动膜界面，并更好地表征界面区的结构。研究结果除被动膜本身外，界面区（包括金属/薄膜 (Me/F) 界面和相邻金属侧）也是被攻击的部位。因此，界面区的微观结构、组成和原子构型等性质是决定被动膜稳定性的关键因素之一。人们对被动膜本身的性质给予了极大的关注。相比之下，被动膜与金属之间的界面可能发挥的作用却很少被考虑在内。基于先进的高空间分辨率分析工具，作者明确了界面结构对被动膜宏观稳定性的重要作用。

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引用次数: 0

Research on the corrosion resistance and the passive film growth of Ni-based superalloy surface treated by ultrasonic impact 超声冲击处理镍基高温合金表面的耐蚀性及钝化膜生长研究

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-12-06 DOI: 10.1108/acmm-09-2023-2899

Hairui Jiang, Jianjun Guan, Yan Zhao, Yanhong Yang, Jinglong Qu

Purpose

The purpose of this study is to investigate the corrosion resistance of superalloys subjected to ultrasonic impact treatment (UIT). The passive film growth on the superalloys’ surface is analyzed to illustrate the corrosion mechanism.

Design/methodology/approach

Electrochemical tests were used to investigated the corrosion resistance of GH4738 superalloys with different UIT densities. The microstructure was compared before and after the corrosion tests. The passive film characterization was described by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) tests.

Findings

The compressive residual stress and corrosion resistance of the specimens significantly increased after UIT. The order of corrosion resistance is related to the UIT densities, i.e. 1.96 s/mm² > 1.71 s/mm² > 0.98 s/mm² > as-cast. The predominant constituents of the passive films are TiO₂, Cr₂O₃, MoO₃ and NiO. The passive film on the specimen with 1.96 s/mm² UIT density has the highest volume fraction of Cr₂O₃ and MoO₃, which is the main reason for its superior corrosion resistance.

Originality/value

This study provides quantitative corrosion data for GH4738 superalloys treated by ultrasonic impact. The corrosion mechanism is explained by the passive film’s characterization.

目的研究高温合金经超声冲击处理后的耐腐蚀性能。分析了高温合金表面钝化膜的生长情况，阐述了钝化膜的腐蚀机理。设计/方法/方法采用电化学试验研究了不同密度的GH4738高温合金的耐蚀性。对比了腐蚀试验前后的微观组织。通过电化学阻抗谱(EIS)和x射线光电子能谱(XPS)测试描述了钝化膜的表征。结果:经高温压缩处理后，试样的残余压应力和抗腐蚀性能明显提高。合金的耐蚀等级与合金密度有关，铸态为1.96 s/mm2 > 1.71 s/mm2 > 0.98 s/mm2 >钝化膜的主要成分是TiO2、Cr2O3、MoO3和NiO。当UIT密度为1.96 s/mm2时，钝化膜中Cr2O3和MoO3的体积分数最高，这是钝化膜具有优异耐蚀性的主要原因。本研究为超声波冲击处理的GH4738高温合金提供了定量的腐蚀数据。钝化膜的特性解释了钝化膜的腐蚀机理。

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引用次数: 0

Study on the scale-forming mechanism of magnesium phosphate by polyepoxysuccinic acid based on solution conductivity method 基于溶液电导率法的聚氧琥珀酸磷酸镁结垢机理研究

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-12-05 DOI: 10.1108/acmm-07-2023-2851

Huihong Feng, Jianxiang Zhao, Jiarui Hou, Huixia Feng

Purpose

This study aims to investigate the influence of polyepoxysuccinic acid sodium (PESA), a green antiscalant, on the nucleation, crystallization and precipitation of magnesium phosphate.

Design/methodology/approach

The conductivity method was used to investigate the maximum relative supersaturation of magnesium phosphate across various PESA dosages. Subsequently, a magnesium phosphate scale was prepared using the static scale inhibition method (GB/T16632-1996) and then analyzed via scanning electron microscopy.

Findings

The findings showed that PESA extends the induction period of magnesium phosphate crystallization, reduces crystal growth rate and elevates the solution’s relative supersaturation. Notably, PESA exerts a low dosage effect on inhibition of the magnesium phosphate scale, with the optimal dosage identified at 10 mL. Scanning electron microscopy revealed that PESA dispenses a dispersing effect on the magnesium phosphate scale, generating numerous concave, convex and deeper pores on the scale particles’ surface, and thereby significantly enhancing the surface area, especially when using an antiscalant with variable dosages.

Originality/value

This study sheds new light on the impact of PESA, a green antiscalant, on the crystallization and precipitation of magnesium phosphate, thus paving the way for the development of enhanced and eco-friendly scale inhibition strategies in future applications.

目的研究绿色抗垢剂聚氧琥珀酸钠(PESA)对磷酸镁成核、结晶和沉淀的影响。设计/方法/方法:采用电导率法研究磷酸镁在不同PESA剂量下的最大相对过饱和度。随后，采用静态阻垢法(GB/T16632-1996)制备磷酸镁阻垢剂，并通过扫描电镜对其进行分析。结果表明:PESA延长了磷酸镁结晶的诱导期，降低了结晶的生长速率，提高了溶液的相对过饱和度。值得注意的是，PESA对磷酸镁水垢的抑制作用较小，最佳剂量为10 mL。扫描电镜结果显示，PESA对磷酸镁垢具有分散作用，在磷酸镁垢颗粒表面产生大量凹、凸和更深的孔隙，从而显著增加表面积，特别是在使用可变剂量的抗垢剂时。原创性/价值本研究揭示了绿色阻垢剂PESA对磷酸镁结晶和沉淀的影响，从而为未来应用中开发增强型和环保型阻垢策略铺平了道路。

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引用次数: 0

Hot corrosion behavior of hot isostatic pressing treated TiC/GTD222 composite fabricated by selective laser melting 选择性激光熔化热等静压处理TiC/GTD222复合材料的热腐蚀行为

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-12-05 DOI: 10.1108/acmm-08-2023-2870

Yuting Lv, Yaojie Liu, Rui Wang, Hongyao Yu, Zhongnan Bi, Guohao Liu, Guangbao Sun

Purpose

This paper aims to design a novel TiC/GTD222 nickel-based high-temperature alloy with excellent hot corrosion resistance by incorporating appropriate amounts of C, Al and Ti elements into GTD222 alloy.

Design/methodology/approach

The composite material was prepared using the selective laser melting (SLM) technology, followed by a hot isostatic pressing (HIP) treatment. Subsequently, the composite underwent a hot corrosion test in a 75% Na₂SO₄ + 25% NaCl mixed salt environment at 900 °C.

Findings

The HIP-SLMed TiC/GTD222 composite exhibits a relatively low weight loss rate. First, the addition of alloying elements facilitates the formation of multiple protective oxide films rich in Al, Ti and Cr. These oxide films play a crucial role in enhancing the material’s resistance to hot corrosion. Second, the HIP treatment results in a reduction of grain size in the composite and an increased number of grain boundaries, which further promote the formation of protective films.

Originality/value

The hot corrosion behavior of the TiC/GTD222 nickel-based composite material prepared through SLM and HIP processing has not been previously studied. This research provides a new approach for designing nickel-based superalloys with excellent hot corrosion resistance.

目的通过在GTD222合金中加入适量的C、Al和Ti元素，设计一种新型的具有优异耐热腐蚀性能的TiC/GTD222镍基高温合金。采用选择性激光熔化(SLM)技术制备复合材料，然后进行热等静压(HIP)处理。随后，复合材料在900℃的75% Na2SO4 + 25% NaCl混合盐环境中进行热腐蚀试验。发现HIP-SLMed TiC/GTD222复合材料具有较低的减重率。首先，合金元素的加入有利于形成富含Al, Ti和Cr的多层氧化保护膜，这些氧化膜对增强材料的耐热腐蚀能力起着至关重要的作用。其次，HIP处理导致复合材料晶粒尺寸减小，晶界数量增加，进一步促进了保护膜的形成。通过SLM和HIP加工制备的TiC/GTD222镍基复合材料的热腐蚀行为尚未得到研究。本研究为设计耐高温腐蚀性能优异的镍基高温合金提供了新的途径。

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引用次数: 0

Prediction of hot corrosion behavior of Inconel 617 via machine learning 基于机器学习的Inconel 617热腐蚀行为预测

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-12-01 DOI: 10.1108/acmm-07-2023-2854

Amir Rezaei

Purpose

This paper aims to study the feasibility of using machine learning in hot corrosion prediction of Inconel 617 alloy.

Design/methodology/approach

By examination of the experimental studies on hot corrosion of Inconel 617, a data set was built for machine learning models. Apart from the alloy composition, this paper included the condition of hot corrosion like time and temperature, and the composition of the saline medium as independent features, while the specific mass change is set as the target feature. In this paper, linear regression, random forest and XGBoost are used to predict the specific mass gain of Inconel 617.

Findings

XGBoost yields the coefficient of determination (R²) of 0.98, which was highest among models. Also, this model recorded the lowest value of mean absolute error (0.20). XGBoost had the best performance in predicting specific mass gain of the alloy in different times at temperature of 900°C. In sum, XGBoost shows highest accuracy in predicting specific mass gain for Inconel 617.

Originality/value

Using machine learning to predict hot corrosion in Inconel 617 marks a substantial progress in this domain and holds promise for simplifying the development and evaluation of novel materials featuring enhanced hot corrosion resilience.

目的研究机器学习在Inconel 617合金热腐蚀预测中的可行性。设计/方法/方法通过对Inconel 617热腐蚀的实验研究，建立了一个用于机器学习模型的数据集。除合金成分外，本文还将热腐蚀条件(如时间、温度)和含盐介质成分作为独立特征，而将比质量变化作为目标特征。本文采用线性回归、随机森林和XGBoost来预测Inconel 617的比质量增益。发现sxgboost的决定系数(R2)为0.98，是所有模型中最高的。该模型的平均绝对误差最小(0.20)。在900℃温度下，XGBoost对合金在不同时间的比质量增益的预测效果最好。总之，XGBoost在预测Inconel 617的比质量增益方面显示出最高的准确性。独创性/价值使用机器学习来预测Inconel 617的热腐蚀标志着该领域的重大进展，并有望简化具有增强热腐蚀弹性的新材料的开发和评估。

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引用次数: 0

Development of a Cr-Ni-Mo alloyed stress corrosion-resistant anchor bolt steel Cr-Ni-Mo合金抗应力腐蚀地脚螺栓钢的研制

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-11-24 DOI: 10.1108/acmm-08-2023-2873

Hailong Du, Zengyao Chen, Xiyan Wang, Yongliang Li, Renshu Yang, Zhiyong Liu, Aibing Jin, Xiaogang Li

Purpose

The purpose of this paper is to develop new types of anchor bolt materials by adding corrosion-resistant elements for alloying and microstructure regulation.

Design/methodology/approach

Three new anchor bolt materials were designed around the 1Ni system. The stress corrosion cracking resistance of the new materials was characterized by microstructure observation, electrochemical testing and slow strain rate tensile testing.

Findings

The strength of the new anchor bolt materials has been improved, and the stress corrosion sensitivity has been reduced. The addition of Nb makes the material exhibit excellent stress corrosion resistance under –1,200 mV conditions, but the expected results were not achieved when Nb and Sb were coupled.

Originality/value

The new anchor bolt materials designed around 1Ni have excellent stress corrosion resistance, which is the development direction of future materials. Nb allows the material to retain its ability to extend in hydrogen-evolution environments.

目的通过添加抗腐蚀元素进行合金化和组织调控，开发新型锚杆材料。设计/方法/方法围绕1Ni系统设计了三种新的地脚螺栓材料。通过显微组织观察、电化学测试和慢应变速率拉伸测试对新材料的抗应力腐蚀开裂性能进行了表征。结果新型锚杆材料的强度得到提高，应力腐蚀敏感性降低。Nb的加入使材料在- 1200 mV条件下表现出优异的抗应力腐蚀性能，但当Nb和Sb耦合时却没有达到预期的效果。围绕1Ni设计的新型地脚螺栓材料具有优异的抗应力腐蚀性能，是未来材料的发展方向。Nb允许材料在析氢环境中保持其扩展的能力。

{"title":"Development of a Cr-Ni-Mo alloyed stress corrosion-resistant anchor bolt steel","authors":"Hailong Du, Zengyao Chen, Xiyan Wang, Yongliang Li, Renshu Yang, Zhiyong Liu, Aibing Jin, Xiaogang Li","doi":"10.1108/acmm-08-2023-2873","DOIUrl":"https://doi.org/10.1108/acmm-08-2023-2873","url":null,"abstract":"<h3>Purpose</h3>\u0000<p>The purpose of this paper is to develop new types of anchor bolt materials by adding corrosion-resistant elements for alloying and microstructure regulation.</p>\u0000<h3>Design/methodology/approach</h3>\u0000<p>Three new anchor bolt materials were designed around the 1Ni system. The stress corrosion cracking resistance of the new materials was characterized by microstructure observation, electrochemical testing and slow strain rate tensile testing.</p>\u0000<h3>Findings</h3>\u0000<p>The strength of the new anchor bolt materials has been improved, and the stress corrosion sensitivity has been reduced. The addition of Nb makes the material exhibit excellent stress corrosion resistance under –1,200 mV conditions, but the expected results were not achieved when Nb and Sb were coupled.</p>\u0000<h3>Originality/value</h3>\u0000<p>The new anchor bolt materials designed around 1Ni have excellent stress corrosion resistance, which is the development direction of future materials. Nb allows the material to retain its ability to extend in hydrogen-evolution environments.</p>","PeriodicalId":8217,"journal":{"name":"Anti-corrosion Methods and Materials","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of post-treated methods on corrosion resistance of MF-DC magnetron sputtering Al coating on TC4 后处理方法对MF-DC磁控溅射铝涂层耐蚀性的影响

4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-11-10 DOI: 10.1108/acmm-07-2023-2857

Wensheng Li, Yiding Zhang, Yanwei Xu, Guangming Jiao, Dunwen Zuo, Wenting Lu, Quanshi Cheng, Jiaqi Yu, Yajun Chen

Purpose This study aims to investigate the effect of post-treatment on anti-corrosion performance of Al coating on the surface of Ti-6Al-4V (TC4) fastener. Design/methodology/approach The Al coatings with different layer structures were prepared on TC4 by middle-frequency and direct-current combined magnetron sputtering. The cross-sectional morphology and surface roughness of coatings were characterized by scanning electron microscope and atomic force microscope. The corrosion resistance was evaluated by electrochemical method. The monolayer coating was post-treated by Alodine chemical conversion, Ar + bombardment and a combination of two methods above. Findings The results show that the interfaces in bilayer and trilayer coatings reduce the defects. Ar + bombardment reduces the corrosion current density, and Alodine chemical conversion leads to a higher pitting corrosion potential. The combined post-treatment has the highest polarization resistance. Originality/value The corrosion resistance of the Al coating is enhanced as the layer quantity increases. The combination of two post-treatments, Ar + bombardment and Alodine chemical conversion, could achieve an overall improvement in corrosion resistance of Al coating.

目的研究后处理对Ti-6Al-4V (TC4)紧固件表面Al涂层防腐性能的影响。采用中频和直流复合磁控溅射技术在TC4上制备了不同层状结构的Al涂层。采用扫描电镜和原子力显微镜对涂层的横截面形貌和表面粗糙度进行了表征。用电化学方法对其耐蚀性进行了评价。采用Alodine化学转化、Ar +轰击及以上两种方法相结合的后处理方法对单层涂层进行后处理。结果表明，双层和三层涂层中的界面减少了缺陷。Ar +轰击降低了腐蚀电流密度，Alodine化学转化导致更高的点蚀电位。复合后处理具有最高的极化电阻。随着层数的增加，铝涂层的耐蚀性增强。结合Ar +轰击和Alodine化学转化两种后处理，可以全面提高Al涂层的耐蚀性。

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引用次数: 0

An electrochemical method for characterizing the structure of double-layer capacity 表征双层容量结构的电化学方法

4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-11-03 DOI: 10.1108/acmm-08-2023-2882

Xilin Xiong, Na Zhang, Tong Niu, Quan Wu

Purpose The relation between metal corrosion behavior and double-layer capacity remains unclear. This study aims to put forward a novel method to measure double-layer capacity. Design/methodology/approach A novel model based on generalized Frumkin–Butler–Volmer equation was put forward. Combining this model with potentiodynamic polarization test and electrochemical impedance spectroscopy, the structure of double-layer capacity can be characterized. Findings This study found that the corrosion rate of iron increased with NaCl solution concentration and temperature at the experimental range, but an essential difference existed. The capacity of the diffuse layer and Stern layer increased with temperature and decreased with NaCl solution concentration. The ratio of diffuse layer capacity and Stern layer capacity influences the corrosion rate directly, which can be regarded as one of the judging criteria for corrosion resistance of metal materials. Originality/value The convenient means of double-layer structure characterization is still blank. With this method, the corrosion behavior of metal materials can be further analyzed, especially in high-temperature and pressure environments.

目的金属腐蚀行为与双层容量之间的关系尚不清楚。本研究旨在提出一种测量双层容量的新方法。设计/方法/方法基于广义Frumkin-Butler-Volmer方程提出了一种新的模型。将该模型与动电位极化测试和电化学阻抗谱相结合，可以表征双层容量的结构。本研究发现，在实验范围内，铁的腐蚀速率随NaCl溶液浓度和温度的增加而增加，但存在本质差异。扩散层和斯特恩层的容量随温度升高而增大，随NaCl溶液浓度的升高而减小。扩散层容量与斯特恩层容量的比值直接影响腐蚀速率，可作为金属材料耐腐蚀性能的判断标准之一。双层结构表征的便捷手段尚属空白。利用这种方法，可以进一步分析金属材料的腐蚀行为，特别是在高温和高压环境下。

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引用次数: 0

Correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors 环氧涂料初老化与典型海洋大气环境因素的相关性研究

4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-11-03 DOI: 10.1108/acmm-09-2023-2894

Dongdong Song, Wenxiang Qin, Qian Zhou, Dong Xu, Bo Zhang

Purpose The anticorrosion coatings used in marine and atmospheric environment are subjected to many environmental factors. And the aging failure has been puzzling researchers. The purpose of this study is to find the correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors. Design/methodology/approach The epoxy coatings were subjected to a one-year exposure in three typical marine atmospheres. Meanwhile, principal component analysis, linear regression and Spearman and gray correlation analysis were applied to quantify the environmental characteristics and establish correlations with the coating aging. Findings The results indicate that the coating will undergo macroscopic fading and chalking upon exposure to the marine atmosphere, while microscopic examination reveals holes, cracks and partial peeling. The adhesion performance and electrochemical properties of the coating deteriorated with prolonged exposure, coating aging mainly occurs with the generation of O-H bonds and the breakage of molecular chains such as C-N and C-O-C. The coating was most deeply aged after exposure to the Xisha, followed by Zhoushan and finally Qingdao. Environmental factors affect the photooxidative aging and hydrolytic degradation processes of coatings and thus coating aging. To further demonstrate the correlation between environmental factors and coating aging, principal component analysis was used. The correlation model between environmental factors and coating aging was subsequently obtained. The correlation model between the rate of coating adhesion loss ( E ) and the comprehensive evaluation parameter of environmental factors ( Z ) is expressed as E = 0.142 + 0.028 Z . Meanwhile, the Spearman correlation analysis and gray correlation method were used to investigate the impact of each environmental factor on coating aging. Solar irradiation, relative humidity and wetting time have the highest correlation with coating aging, which are all above 0.8 and have the greatest influence on coating aging; wind speed and temperature have the smallest correlation with coating aging, which are about 0.6 and have the least influence on coating aging. Originality/value This paper establishes a correlation between typical marine environmental factors and coating aging performance, which is crucial for predicting the service life of other coatings in diverse environments.

目的在海洋和大气环境中使用的防腐涂料受多种环境因素的影响。而这种衰老失败一直困扰着研究人员。本研究的目的是找出环氧涂料初老化与典型海洋大气环境因素的相关性。设计/方法/方法环氧涂层在三种典型的海洋大气中暴露一年。同时，运用主成分分析、线性回归分析、Spearman和灰色关联分析等方法对环境特征进行量化，建立与涂层老化的相关性。结果表明，涂层暴露于海洋大气中，宏观上出现褪色和白垩，微观上出现孔洞、裂纹和局部剥落。涂层的粘附性能和电化学性能随着暴露时间的延长而变差，涂层老化主要发生在O-H键的生成和C-N、C-O-C等分子链的断裂。西沙暴露后涂层老化最深，其次是舟山，最后是青岛。环境因素影响涂料的光氧化老化和水解降解过程，从而影响涂料的老化。为了进一步证明环境因素与涂层老化之间的相关性，采用主成分分析方法。建立了环境因素与涂层老化的相关模型。涂层附着损失率(E)与环境因素综合评价参数(Z)的相关模型表示为E = 0.142 + 0.028 Z。同时，采用Spearman关联分析法和灰色关联法研究各环境因素对涂层老化的影响。太阳辐照度、相对湿度和润湿时间与涂层老化的相关性最高，均在0.8以上，对涂层老化的影响最大;风速和温度与涂层老化的相关性最小，均在0.6左右，对涂层老化的影响最小。本文建立了典型海洋环境因素与涂层老化性能之间的相关性，这对预测其他涂层在不同环境下的使用寿命具有重要意义。

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引用次数: 0

Influence of microstructure of CoCrNi medium entropy alloy on its corrosion behavior CoCrNi介质熵合金显微组织对其腐蚀行为的影响

4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2023-10-27 DOI: 10.1108/acmm-06-2023-2840

Junyu Shi, Shengli Ling, Yinjie Kuang, Yonggang Tong, Yongle Hu, Dunying Deng

Purpose The purpose of this paper is to reveal the effect of microstructure on the corrosion behavior of CoCrNi alloy in 3.5 Wt.% NaCl solution. Design/methodology/approach The as-cast CoCrNi alloy was prepared by arc melting, and the cold-rolled and annealed alloys were prepared by processing the as-cast alloy. Findings The experimental results showed that a protective passivation film was formed on the surfaces of these CoCrNi MEA, and the stability and compactness of alloys increased in the sequence of cold-rolled, as-cast and annealed CoCrNi alloys. The annealed CoCrNi alloys had the best pitting resistance. Originality/value This study proposes the effect of the microstructure of CoCrNi alloy on corrosion resistance.

目的研究微观组织对CoCrNi合金在3.5 Wt.% NaCl溶液中腐蚀行为的影响。设计/方法/方法采用电弧熔炼法制备铸态CoCrNi合金，并对铸态CoCrNi合金进行冷轧和退火处理。结果表明:CoCrNi MEA表面形成了一层保护钝化膜，合金的稳定性和致密性随CoCrNi合金冷轧、铸态和退火的顺序而提高。退火后的CoCrNi合金抗点蚀性能最好。本研究提出了CoCrNi合金的显微组织对耐蚀性的影响。

引用次数: 0