引用本文:时龙,辛丽,王福会,陈庆,田爱华,吕雪飞.纳米晶涂层对DD98M合金热腐蚀行为的影响[J].中国表面工程,2017,30(5):1~9
SHI Long,XIN Li,WANG Fu-hui,CHEN Qing,TIAN Ai-hua,LV Xue-fei.Influences of Nanocrystalline Coating on Hot Corrosion Behavior of DD98M Alloy[J].China Surface Engineering,2017,30(5):1~9
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纳米晶涂层对DD98M合金热腐蚀行为的影响
时龙1,2, 辛丽2, 王福会2, 陈庆1, 田爱华1, 吕雪飞1
1.吉林化工学院 机电工程学院, 吉林 132022, 吉林;2.中国科学院金属研究所 腐蚀与防护实验室, 沈阳 110016
摘要:
为了研究纳米化对DD98M合金热腐蚀行为的影响，采用磁控溅射的方法制备了与其成分相同的纳米晶涂层。运用XRD、SEM/EDS、TEM分别分析了涂层的结构和热腐蚀性能。结果表明：沉积态的纳米晶涂层呈柱状晶结构，有大量沿沉积方向的柱状晶界，晶粒宽度为30~100 nm。涂层为单一的γ相且具有明显的（111）择优取向。在900 ℃Na2SO4+25%K2SO4以及Na2SO4+25%NaCl盐中，DD98M合金在5 h内就发生了严重腐蚀。纳米晶涂层在熔融Na2SO4+25%K2SO4中表现出了良好的热腐蚀性能，但在Na2SO4+25%NaCl盐中，纳米晶及其预氧化涂层对DD98M合金的抗热腐蚀性能的提高并不明显。纳米晶促进了涂层表面Al2O3膜在空气中和熔融Na2SO4+25%K2SO4盐中的快速形成，显著提高了DD98M合金在硫酸盐中的抗热腐蚀性能，预氧化处理则使涂层的抗热腐蚀能力进一步提高。
关键词:  DD98M合金  纳米晶涂层  热腐蚀  预氧化
DOI：10.11933/j.issn.1007-9289.20170511001
分类号:
基金项目:国家重点基础研究发展计划（973计划）（2012CB625100）；国家自然科学基金（U1537107）；吉林化工学院校级重大科研项目（2016016）
Influences of Nanocrystalline Coating on Hot Corrosion Behavior of DD98M Alloy
SHI Long1,2, XIN Li2, WANG Fu-hui2, CHEN Qing1, TIAN Ai-hua1, LV Xue-fei1
1.College of Mechanical and Electrical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin;2.Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
Abstract:
In order to investigate the influences of nanocrystallization on the hot corrosion behavior of DD98M alloy, a nanocrystalline coating with the same composition as DD98M alloy was deposited by means of a magnetron sputtering method. The structure and hot corrosion properties of the coatings were analyzed by XRD, SEM/EDS, and TEM, respectively. The results indicate that the DD98M sputtered nanocrystalline coating possesses a typical columnar structure with the width of the columnar grains ranges from 30 to 100 nm. The coating is composed only of γ phase and exhibits an apparent (111) texture. After exposure for 5 h in molten Na2SO4+25%K2SO4 and Na2SO4+25%NaCl salts at 900℃, DD98M alloy occurs severe corrosion. The nanocrystalline coating exhibits good hot corrosion performance in the molten sulfate; however, in molten Na2SO4+25% NaCl salt, the corrosion resistance of DD98M alloy is not significantly enhanced by the nanocrystalline coating and the pre-oxidized coating. Nanocrystallization prompts the rapid formation of alumina scale on the coating surface in air and in molten sulfate, significantly improves the corrosion resistance of DD98M alloy in sulfate, and the pre-oxidation treatment of the sputtered coating leads to an even better effect.
Key words:  DD98M alloy  nanocrystalline coating  hot corrosion  pre-oxidation
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