【摘要】 采用差示扫描量热(DSC)分析技术测定了Al-34%Mg-6%Zn合金作为潜热储蓄材料的热性能。研究了该合金在长期储放热过程中对容器材料的腐蚀。腐蚀试验选用的容器材料是不锈钢(SS304L)和碳钢(C20)。在1000次热循环(熔融和凝固)的腐蚀实验中,对SS304L和C20钢试样进行了失重(mg/cm2)、腐蚀速率(mg/day)的热重分析,以及显微组织结构的金相研究。结果表明,对于长期的储能应用,SS304L钢比C20钢更能与该合金相容。同时还讨论了在热循环过程中,SS304L和C20钢上形成腐蚀产物的过程和机理。更多还原

【Abstract】 The thermal properties of Al-34%Mg-6%Zn alloy as a latent heat storage material were determined by the differential scanning calorimetry(DSC) analysis technique.The corrosion resistance of some structural materials,including stainless steel SS304L and carbon steel C20,for the container of the alloy over a long heat storage or release period was studied.Gravimetric analysis of mass loss(mg/cm~2) and corrosion rate(mg/day) and metallographic investigation were performed for corrosion tests after 1000 thermal cycles(melting and solidification).SS304L showed more suitable compatibility with the alloy than C20 in long-term thermal storage application.The formation process and mechanism of corrosion products during thermal cycles were also discussed.更多还原