2熔鹽中加入納米級MgO顆粒與MgCl2·6H2O原位自生MgO對KCl-MgCl2鹽腐蝕性的影響。結(jié)果表明：Inconel 625熔敷金屬在KCl-MgCl2、KCl-MgCl2+5% MgO和KCl-MgCl2+5% MgCl2·6H2O（質(zhì)量分數(shù)）中經(jīng)過72 h的腐蝕后，試樣的質(zhì)量損失分別為0.00714、0.00512和0.00308 g·cm-2。Inconel 625熔敷金屬在原位自生MgO熔鹽中的腐蝕速率同比降低56.86%和39.85%。熔鹽中加入納米MgO顆粒雖然能夠緩解氯化物熔鹽的腐蝕性，但熔鹽發(fā)生團聚或沉降現(xiàn)象，導(dǎo)致MgO和MgCr2O4保護殼層分布不均勻；在熔鹽中添加MgCl2·6H2O使其原位生成MgO，生成的MgO和MgCr2O4保護殼層更加均勻，能夠阻礙腐蝕性介質(zhì)侵蝕，是降低氯化物熔鹽腐蝕性的有效方法。;Molten chloride salt is excellent candidature for third-generation solar energy storage media due to its good energy storage advantages and low price. However, in the actual working environment, molten chloride salt has strong corrosion to metal pipes (Inconel 625 alloy). Inconel 625 welding wire is usually used as a repair material for solar pipeline. In order to solve the problem of strong corrosion of molten chloride salt to Inconel 625 cladding metal, Inconel 625 cladding metal was welded by MAG welding, and the effect of nano-MgO particles and MgCl2·6H2O in-situ self-generated MgO on the corrosion of KCl-MgCl2 molten salt was investigated. The results show that after 72 h of corrosion in KCl-MgCl2, KCl-MgCl2+5wt% MgO and KCl-MgCl2+5wt% MgCl2·6H2O, the mass loss of Inconel 625 cladding metal is 0.00714, 0.00512, and 0.00308 g·cm-2, respectively. The corrosion rate of Inconel 625 cladding metal in molten salt with in-situ self-generated MgO is decreased by 56.86% and 39.85%. Although the addition of nano-MgO particles in the molten salt can alleviate the corrosion of the chloride molten salt, the molten salt is agglomerated or settled, leading to a non-uniform distribution of MgO and MgCr2O4 protective shell layers. Adding MgCl2·6H2O to the molten salt can generate in-situ MgO, and the generated MgO and MgCr2O4 protective shells are more uniform, which hinder the erosion of corrosive media, so it is an effective method to reduce the corrosion of chloride molten salt."/>