李瑛
,
林海潮
,
曹楚南
中国腐蚀与防护学报
利用扫描隧道显微镜观察了大气条件下FeNiSiB非晶合金在自然大气环境下腐蚀前后表面的微观形貌特征,并对所获结果进行分析,以探讨非晶合金的微观结构与大气腐蚀行为的关系。结果表明:实验所用非晶材料的微观结构是由几个原子首先组成2纳米左右的颗粒团,此颗粒团经无序密堆,最后形成非晶合金。非晶合金结构具有自仿性,在微米、纳米尺度具有相同的分维数;在大气中非晶合金以2纳米左右的颗粒团为基本单元发生均匀腐蚀,且腐蚀前后非晶合金表面具有相同的分维数。
关键词:
大气腐蚀
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Amorphous alloys
,
STM
,
Fractal dimension
梁彩凤
,
侯文泰
中国腐蚀与防护学报
分析了我国七个试验点十七种钢的八年大气腐蚀试验结果,对润湿时间、二氧化硫及盐粒子的污染作用提出了新的看法。对非耐候钢,湿热条件对长期腐蚀的影响非常大,如果加上污染,会造成特别高的腐蚀。讨论了用气象及污染特征划分大气腐蚀性等级的ISO9223国际标准。碳钢、低合金钢在不同腐蚀环境中,暴露第一年期间所显示的大气腐蚀规律与长期暴露所显示的不同,因此用钢的第一年腐蚀结果来测定大气腐蚀性是不妥当的。
关键词:
大气腐蚀
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Steel
,
Environment factors
,
Atmospheric corrosivity
Ye WAN
,
Chuanwei YAN
,
Chunan CAO
,
Jun TAN
材料科学技术（英文）
A laboratory study of the atmospheric corrosion of carbon steel deposited with (NH4)2SO4 in the presence of SO2 is reported. The different levels of (NH4)2SO4 (0, 15, 30, 45, 60μg·cm2 were added on the surface of the samples before the exposure. The corrosion was investigated by a combination of gravimetry, Fourier transform infrared spectroscope and scanning electron microscopy. A detailed knowledge about the corrosion products was acquired, both quantitatively and qualitatively. The results show that the metal loss increased and the increasing tendency of corrosion rates slowed down with the increasing exposure time. The phase constituents of the corrosion products are mainly α-FeO(OH), γ-FeO(OH), and δ-FeO(OH).
关键词:
Steel A3
,
null
,
null
,
null
,
null
Andrej Atrens
材料科学技术（英文）
Corrosion research by Atrens and co-workers has made significant contributions to the understanding of the service performance of engineering materials. This includes: (1) elucidated corrosion mechanisms of Mg alloys, stainless steels and Cu alloys, (2) developed an improved understanding of passivity in stainless steels and binary alloys such as Fe-Cr, Ni-Cr, Co-Cr, Fe-Ti, and Fe-Si, (3) developed an improved understanding of the melt spinning of Cu alloys, and (4) elucidated mechanisms of environment assisted fracture (EAF) of steels and Zr alloys. This paper summarises contributions in the following: (1) intergranular stress corrosion cracking of pipeline steels, (2) atmospheric corrosion and patination of Cu, (3) corrosion of Mg alloys, and (4) transgranular stress corrosion cracking of rock bolts.
关键词:
Stress corrosion cracking
,
null
,
null
