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MI Feng yi WANG Xiang dong LIU Zhi pu WANG Bing PENG Yun TAO Dong ping 《钢铁研究学报(英文版)》2011,18(6):67-73
The corrosion behavior of low carbon steel (CS), P bearing steel (PS) and P RE weathering steel (P REWS) exposed for two years in Jiangjin of China was investigated. The results showed that during 2 year exposure test, corrosion data of the experimental steels followed the bilogarithmic equation, and the average corrosion depth of PS and P REWS was decreased by 195% and 282% respectively compared with that of CS. Scanning electron microscope, electrochemical impedance spectroscope and Fourier transform infrared spectroscope were used to characterize the corrosion products. The research results showed that P in steel could promote the formation of an amorphous ferric oxyhydroxide layer near the substrate. The addition of RE could effectively increase the charge transportation resistance of rust. 相似文献
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回顾了近年来耐候钢研究的进展概况,重点总结了耐候钢的实验研究方法、锈层的形成机理、锈层的显微组织及生长过程中的影响因素,分析了钢的腐蚀防护情况.指出了以往研究的不足以及今后的研究方向. 相似文献
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稀土对碳素钢在模拟工业性大气腐蚀环境下耐蚀性的影响 总被引:1,自引:0,他引:1
利用浸泡、电化学方法研究了Ce/La混和稀土对碳素钢在腐蚀介质中的缓蚀作用,采用相分析、周浸、锈层分析等方法研究了稀土对碳素钢耐工业性大气腐蚀性能的影响。结果表明:在模拟工业性大气腐蚀环境的酸性NaHSO3溶液中,稀土丝分解后生成的稀土离子是一种混合型缓蚀剂;在对碳素钢的缓蚀过程中,Ce/La离子沉积于同一区域;随钢中稀土含量增加,钢中相界固溶稀土和稀土/铁金属间化合物总量增加,钢的耐蚀性得到大幅度提高。另外,还对稀土减缓钢铁腐蚀过程进行了讨论,提出了稀土对碳素钢的缓蚀机理。 相似文献
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《钢铁研究学报(英文版)》2016,(10):1061-1070
Q235 carbon steel and Q450 weathering steel were exposed to the hot and dry environment of Turpan, China for three years.The corrosion rates of both steels were calculated and compared.The morphologies of the rust layer products were observed by optical microscopy and scanning electron microscopy.Analyses of the rust layers were performed by X-ray photoelectron spectroscopy,X-ray powder diffraction,and Raman spectroscopy,and anal-ysis results indicate that the compositions of rust are main iron rich oxide such as FeOOH,Fe3 O4 ,and Fe2 O3 .The iron oxide layer content proportion was calculated through a semi-quantitative algorithm.The resistance elements (Cr,Ni,and Cu)enhanced the resistance properties of the Q450 weathering steel matrix.Moreover,the resistance elements increased the proportion of goethite crystals in the corroded rust layer. 相似文献
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BNQ系列冷轧耐候钢的耐蚀性能 总被引:1,自引:0,他引:1
通过大气腐蚀试验、室内加速腐蚀试验、电化学测试和锈层分析,研究了BNQ系列冷轧耐候钢的耐腐蚀性能。结果表明不仅有低的腐蚀率而且有好的耐锈稳定性和适应性。并详细讨论了该钢种具有高耐候性的原因。 相似文献
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《山东冶金》2016,(1)
利用加速腐蚀试验,对Q345低合金钢和Q355耐候钢不同时间腐蚀后试样的锈层形貌及腐蚀产物进行对比分析,结果表明:两种试验钢的锈层均主要由α-Fe OOH、γ-Fe OOH和Fe2O3组成,随着腐蚀时间延长,α-Fe OOH、γ-Fe OOH含量逐渐增加,Fe2O3含量逐渐降低,锈层颜色呈现黑色→红色→黄棕色的变化规律。与低合金钢相比,耐候钢锈层中α-Fe OOH含量在不同时间腐蚀后均比低合金试验钢高,并较早由不连续块/片状逐渐长大发展成连续/致密的针状或片状物,孔洞少且较致密平整,附着力强,不易脱落。耐候钢的腐蚀率明显低于低合金钢,且在试验涉及的腐蚀时间内变化不大。 相似文献
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《钢铁研究学报(英文版)》2015,(11)
Weathering steel is widely used in various fields due to its excellent mechanical properties and high corrosion resistance. The effect of chromium content on the S450 EW weathering steel in cyclic immersion test was studied. The results indicated that the corrosion resistance of S450 EW weathering steel is closely related to chromium content. The addition of chromium significantly inhibited the weathering steel corrosion. The corrosion rate of experimental steel after 96 h immersion was 1.101 g·m-2·h-1. The rust of S450 EW weathering steel was mainly constituted of Fe OOH and Fe3O4 phase, and the elevation of chromium content promoted the formation of α-Fe OOH. The fine precipitates of the two phases contributed to the formation of dense dust layer of test steel. Furthermore, the increase of chromium is beneficial for the cure of original defects and cracks of the rust layer via the enrichment of chromium. The corrosion potential and the resistance of corrosion process were thus increased, protecting the experimental steel from further corrosion. A S450 EW steel with corrosion resistance more than 1.5 times of Q450NQR1 steel was prepared. 相似文献
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The mechanical properties, corrosion resistance and microstructures of high performance steel (HPS) was investigated by tensile testing machine, Charpy V-Notch (CVN) testing machine, cyclic immersion corrosion tester, XRD, optical microscopy (OM), scanning electron microscopy (SEM), and electron probe micro-analyzer (EPMA). The results showed that significant differences existed in the tensile strength, yield strength and impact toughness between HPS and PCS. After 72 h cyclic immersion accelerated corrosion test, the inner rust layer on HPS was composed of α-FeOOH phase and denser than that on PCS that was a mixture of α-FeOOH and Fe3O4. The rust formed on HPS provides better protection and HPS has lower corrosion rates than PCS. Copper and chromium in HPS enrich in the rust layer and enhance the compactness of the rust layer. Based on the results of the accelerated corrosion tests and rust layer analysis, the roles of Cu and Cr against corrosion are discussed, providing HPS with chemical specification which has been industrially successful to produce weathering steel for bridge structure. 相似文献
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耐大气腐蚀钢09CuPTiRE的试制 总被引:1,自引:0,他引:1
重钢采用 110 0mm× 170mm板坯连铸结晶器喂RE丝工艺 ,试制耐大气腐蚀钢 0 9CuPTiRE。连铸板坯中稀土分布均匀 ,成品板材符合标准要求 相似文献
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通过亚温淬火法制备了09CuPCrNi双相钢,采用中性盐雾试验、极化曲线的测定,研究了双相化处理对耐候钢耐腐蚀性能的影响。780 ℃亚温淬火的09CuPCrNi双相钢在5%的NaOH、H2SO4、HCl水溶液以及3.5%的NaCl水溶液中的腐蚀行为与09CuPCrNi耐候钢相似,自腐蚀电流密度分别比09CuPCrNi耐候钢降低了170%、182%、31.2%和17.8%。在腐蚀周期分别为48 h和120 h的盐雾试验中,双相钢的腐蚀速率分别比09CuPCrNi耐候钢降低了7.9%~22.2%和2.3%~130%。 相似文献
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通过盐雾箱加速腐蚀试验和交流阻抗的测试,研究了3mm板Corten A钢(/%:0.59C、0.16Si、0.31Mn、0.14P、0.009S、0.49Ni、0.52Cr、0.35Cu)和Corten Cr2钢(/%:0.59C、0.16Si、0.30Mn、0.14P、0.012S、1.00Ni、1.94Cr、0.36Cu)的耐腐蚀性,并用扫描电镜和能谱分析法分析了锈层、基体的组织、成分和耐蚀机理。结果表明,在5%氯化钠盐雾腐蚀120 h后Corten Cr2钢的平均腐蚀速率为Corten A钢的65.86%;Corten Cr2钢腐蚀层表面和钢板表面Cr原子百分比和氧化铬的富集程度均高于Corten A钢。 相似文献
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含Cu耐候钢中稀土对耐蚀性的影响研究 总被引:2,自引:1,他引:1
利用周期浸润加速腐蚀试验方法对10PCuRE和10PCu耐候钢进行了腐蚀试验.通过X射线衍射分析、电子探针和扫描电镜等手段对两种钢的表面锈层性能进行了研究,得到了10PCuRE钢致密锈层的种类、形成过程以及保护机理.通过对加稀土与未加稀土的耐候钢表面锈层的对比研究,可知10PCuRE钢的表面锈层比10PCu耐候钢的锈层要均匀致密,保护性能更好.稀土耐候钢的锈层分为两层,包括外锈层和均匀致密的内锈层,内锈层的组成相中超过80%为保护性的α-FeOOH.稀土促进了合金元素Cu在内锈层的富集,有利于保护性内锈层的生成,因而提高了钢基体的耐蚀性能. 相似文献
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通过合适的成分设计和控轧控冷工艺开发出一种综合力学性能优异的Nb-V微合金化含Cu高强度耐候钢(/%:≤0.12C,≤0.40Si,≤1.40Mn,≤0.020P,≤0.010S,0.40~0.45Cr,0.25~0.35Cu, ≥0.020Al,0.02~0.03Nb,0.02~0.03V),并对其耐蚀性能进行了研究。该高强耐候钢组织由铁素体、珠光体和贝氏体组成,抗拉强度高达697 MPa,屈强比为0.73,断后伸长率为24.6%, -40℃纵向冲击功为70.6 J。盐雾及周期浸润试验结果表明,该钢耐蚀性能显著优于Q345B,其锈层主要由Fe3O4、α-FeO(OH)和γ-FeO(OH)构成,且随着时间增加,Fe3O4相对含量增加,α-FeO(OH)变化较小,γ-FeO(OH)减少。 相似文献