Isolation or corrosion of microporous alumina in contact with various CaO-Al2O3-SiO2 slags. (15th May 2017)

• Record Type: Journal Article
• Authors: Fu, Lvping; Huang, Ao; Lian, Pengfei; Gu, Huazhi
• Is Part Of: Corrosion science. Volume 120(2017)
• Page Start: 211
• Page End: 218
• Publication Date: 2017-05-15
• Subjects: Ceramic -- Erosion -- Modelling studies -- Intergranular corrosion -- Kinetic parameters; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2017.01.018
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: A model describing the dissolution of porous alumina in molten slags was proposed. This model was proposed for the first time. Relationship between the rate of dissolution and precipitation effects the corrosion behavior. The pore size of alumina has a crucial impact on its dissolution in the molten slags. The apparent porosity of alumina affects the slag penetration into the alumina. Abstract: Is the microporous structure able to protect lightweight alumina aggregates against corrosion of various molten slags? The effects of the slag compositions and structural parameters of alumina aggregates on their slag resistance behavior were investigated, and a dissolution rate model was proposed to describe the dissolution of alumina in the various molten slags inside the pores. Compared to the apparent porosity, the pore size has a crucial impact on dissolution of the lightweight alumina aggregates in the molten slags. A balance between the alumina dissolution rate and the solid phase precipitation rate should be achieved to form an isolation layer.