화학공학소재연구정보센터
KAGAKU KOGAKU RONBUNSHU, Vol.27, No.6, 761-764, 2001
Cause of exfoliation of glass lining layer on stainless steel
The effect of the type of base metal on the exfoliation was examined, The corrosion at the interface between the base metal and the ground coat layer was investigated by analyses of the interface and exfoliation surfaces. The cause of exfoliation was studied by analysis of stress distribution by the finite element method. The exfoliation Of the glass lining layer was observed only in the specimen using austenite stainless steel (SUS 304) as the base metal in the short turin. It was found that Si, Cr and Fe were present as oxides and Ni was absent at the exfoliation surface from the results, of MIS analysis on the exfoliation surface Of the base metal and the glass lining layer the cause Of corrosion between the base metal and the ground coat layer was speculated to be formation Of a part with low corrosion resistance by, reaction between the ground coat glass and the spinel type oxide, ( NiO or FeO). Cr2O3. when SUS 304 is used as the base metal. The result uf stress distribution analysis by the finite element method showed that large shearing stress Was generated at the front Of Corrosion between the base metal and the ground coat layer.