Na_2SO_4·10H_2O基复合相变储能材料对金属封装材料腐蚀性研究
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摘要
采用失重法,并对腐蚀产物的物质组成和显微结构进行X射线衍射和扫描电镜分析,对十水硫酸钠基复合相变储能材料相变循环对不锈钢、铝合金、纯铜和黄铜等金属封装材料的腐蚀动力学特性进行了研究。结果表明:金属封装材料的耐腐蚀性为不锈钢最佳,紫铜的耐腐蚀性最差,其顺序为:不锈钢304>不锈钢201>铝合金1060>铝合金5052>铝合金6061>铝合金7075>黄铜>紫铜,纯铜的腐蚀主要以点蚀形式存在,蚀孔表面有Cu_2O膜的存在,Cl-的存在与氧竞争吸附,加速腐蚀;黄铜也存在点蚀,同时黄铜与相变材料反应,生成物质粘附在黄铜表面。铝合金腐蚀以点蚀形式存在,腐蚀产物呈开裂状附着于基体表面。铜及合金和铝合金不适合做芒硝基复合相变储能材料的封装材料,不锈钢201和304呈现良好的耐腐蚀状态,适宜作为芒硝基复合相变储能材料的金属封装材料。
Corrosion product,the corrosion kinetics of metal packaging materials,including stainless steel,aluminium alloy,red copper and brass,by sodium sulfate decahydrate based composite phase change material were investigated by weight-loss method and X-ray diffraction analysis( XRD) and scanning electron microscopy( SEM) analysis. The results show that the corrosion resistance of stainless steel is best,and the pure copper is worst. Order of corrosion resistance is: stainless steel 304 >stainless steel 201 > 1060 aluminum > aluminum alloy 5052 > aluminum alloy 6061 > aluminum alloy7075 > brass > copper. The pitting corrosion is the main corrosion form for copper and brass. For copper,the corrosion hole is consisted of Cu_2O,the presence of adsorption oxygen competing with Claccelerates the corrosion; Brass also exists pitting corrosion,while the reaction of brass and phase change materials,the formation of material adhesion on the surface of brass. Aluminum shows pitting corrosion,of which the corrosion product is cracking like and adhere to the substrate surface. Copper,brass andaluminum alloy are not suitable for the packaging materials for phase change energy storage material.Stainless steel 201 and 304 presentes good resistance to corrosion,are suitable as metal-based packaging materials for storage phase change material.
Corrosion product,the corrosion kinetics of metal packaging materials,including stainless steel,aluminium alloy,red copper and brass,by sodium sulfate decahydrate based composite phase change material were investigated by weight-loss method and X-ray diffraction analysis( XRD) and scanning electron microscopy( SEM) analysis. The results show that the corrosion resistance of stainless steel is best,and the pure copper is worst. Order of corrosion resistance is: stainless steel 304 >stainless steel 201 > 1060 aluminum > aluminum alloy 5052 > aluminum alloy 6061 > aluminum alloy7075 > brass > copper. The pitting corrosion is the main corrosion form for copper and brass. For copper,the corrosion hole is consisted of Cu_2O,the presence of adsorption oxygen competing with Claccelerates the corrosion; Brass also exists pitting corrosion,while the reaction of brass and phase change materials,the formation of material adhesion on the surface of brass. Aluminum shows pitting corrosion,of which the corrosion product is cracking like and adhere to the substrate surface. Copper,brass andaluminum alloy are not suitable for the packaging materials for phase change energy storage material.Stainless steel 201 and 304 presentes good resistance to corrosion,are suitable as metal-based packaging materials for storage phase change material.
引文
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[19]Hunter M S,Foele P.Natural and Thermally Formed Oxide Films on Aluminum[J].Journal of the Electrochemical Society,1956,103(9):482-485.
[20]马腾,王振尧,韩薇.铝和铝合金的大气腐蚀[J].腐蚀科学与防护技术,2004,16(3):156-161.Ma T,Wang Z Y,Han W.A Review of Atmospheric Corrosion of Aluminum and Aluminum Alloys[J].Corrosion science and protection technology,2004,16(3):156-161(in Chinese).
[21]刘艳洁,王振尧,柯伟.2024-T3铝合金在模拟海洋大气环境中的腐蚀行为[J].中国有色金属学报,2013,23(5):1208-1216.Liu Y J,Wang Z Y,Ke W.Corrosion Behavior of 2024-T3 Aluminum Alloy in Simulated Marine Atmospheric Environment[J].The Chinese Journal of Nonferrous Metals,2013,23(5):1208-1216(in Chinese).
[2]Liu X,Tie J,Tie S N.Effect of Nano Powder Addition on the Subcooling and Phase Stratification of Sodium Sulfate Decahydrate[J].Journal of Synthetic Crystals,2015,44(11):3074-3080.
[3]蒋自鹏,铁生年.物理法制备芒硝基复合相变材料及其性能研究[J].人工晶体学报,2015,44(12):3120-3127.Jiang Z P,Tie S N.Preparation and Properties of Glauber's Salt-based Composites Phase Change Materials by Physical Method[J].Journal of Synthetic Crystals,2015,44(12):3120-3127(in Chinese).
[4]Farrell A J,Norton B,Kennedy D M.Corrosive Effects of Salt Hydrate Phase Change Material Used with Aluminium and Copper[J].Journal of Material Processing Technology,2006,175(2):198-205.
[5]Nagano K,Ogawa K,Mochida T,et al.Performance of Heat Charge Discharge of Magnesium Nitrate Hexahydrate and Magnesium Chloride Hexahydrate Mixture to a Aingle Vertical Tube for a Latent Heat Storage System[J].Applied Thermal Engineering,2004,24(2):209-220.
[6]Goods S H,Branshaw R W.Corrosion Resistance of Stainless Steels During Thermal Cycling in Alkali Nitrate Molten Salts[J].Journal of Materials Engineering and Performance,2004,13(1):78-87.
[7]王振尧,于国才,韩薇.三种有色金属在沈阳地区的大气腐蚀规律[J].中国有色金属学报,2003,13(2):367-372.Wang Z Y,Yu G C,Han W.Atmospheric Corrosion Law of Three Non-ferrous Metals in Shenyang Area[J].The Chinese Journal of Nonferrous Metal,2003,13(2):367-372(in Chinese).
[8]Wang B B,Wang Z Y,Han W,et al.Atmospheric Corrosion of Aluminium Alloy 2024-T3 Exposed to Salt Lake Environment in Western China[J].Corrosion Science,2012,59:63-70.
[9]孙霜青,郑弃非,李德富,等.LY12铝合金的长期大气腐蚀行为[J].中国腐蚀与防护学报,2009,29(6):442-446.Sun S Q,Zheng Q F,Li D F,et al.Long-term Atmospheric Corrosion Behavior of LY12 Aluminum Alloy[J].Journal of Chinese Society for Corrosion and Protection,2009,29(6):442-446(in Chinese).
[10]Garcia-Romero A,Delgado A,Urresti A,et al.Corrosion Behavior of Several Aluminum Alloys in Contact with a Thermal Storage Phase Change Material Based on Glauber's Salt[J].Corrosion Science,2009,51:1263-1272.
[11]Cabeza L F,Illa J,Roca J,et al.Immersion Corrosion Tests on Metal-salt Hydrate Pairs Used for Latent Heat Storage in the 32 to 36℃Temperature Range[J].Materials and Corrosion,2001,52(2):140-146.
[12]Cabeza L F,Illa J,Roca J,et al.Middle Term Immersion Corrosion Tests on Metal-salt Hydrate Pairs Used for Latent Heat Storage in the 32 to36℃Temperature Range[J].Materials and Corrosion,2001,52(10):748-754.
[13]Cabeza L F,Roca J,Nogués M,et al.Immersion Corrosion Tests on Metal-salt Hydrate Pairs Used for Latent Heat Storage in the 48 to 58℃Temperature Range[J].Materials and Corrosion,2002,53(12):902-907.
[14]Cabeza L F,Roca J,Nogués M,et al.Long Term Immersion Corrosion Tests on Metal-PCM Pairs Used for Latent Heat Storage in the 24 to 29℃Temperature Range[J].Materials and Corrosion,2005,56(1):33-38.
[15]王凤平.金属腐蚀与防护实验[M].北京:化学工业出版社,2014,42.
[16]何业东,齐慧滨.材料腐蚀与防护概论[M].北京:机械工业出版社,2005,115.
[17]董超芳,安英辉,李晓刚,等.7A04铝合金在海洋大气环境中初期腐蚀的电化学特性[J].中国有色金属学报,2009,19(2):346-352.Dong C F,An Y H,Li X G,et al.Electrochemical Performance of Initial Corrosion of 7A04 Aluminium Alloy in Marine Atmosphere[J].The Chinese Journal of Nonferrous Metals,2009,19(2):346-352(in Chinese).
[18]Godard H P,Jepson W B,Boyhwell M R,Kane R L.The Corrosion of Light Metals[M].New York:John Wiley,1967:3.
[19]Hunter M S,Foele P.Natural and Thermally Formed Oxide Films on Aluminum[J].Journal of the Electrochemical Society,1956,103(9):482-485.
[20]马腾,王振尧,韩薇.铝和铝合金的大气腐蚀[J].腐蚀科学与防护技术,2004,16(3):156-161.Ma T,Wang Z Y,Han W.A Review of Atmospheric Corrosion of Aluminum and Aluminum Alloys[J].Corrosion science and protection technology,2004,16(3):156-161(in Chinese).
[21]刘艳洁,王振尧,柯伟.2024-T3铝合金在模拟海洋大气环境中的腐蚀行为[J].中国有色金属学报,2013,23(5):1208-1216.Liu Y J,Wang Z Y,Ke W.Corrosion Behavior of 2024-T3 Aluminum Alloy in Simulated Marine Atmospheric Environment[J].The Chinese Journal of Nonferrous Metals,2013,23(5):1208-1216(in Chinese).