1995 Volume 81 Issue 10 Pages 989-994
Iron and steel have been predominantly adapted for mechanical parts in hot-dip plating pots of continuous galvanizing line. However, corrosion and wear resistance are not enough against molten zinc then mechanical parts such as sink and support rolls must frequently be changed and repaired to maintain good surface finishes of the products.
In this work, corrosion resistance, friction coefficient and wear resistance against sialon ceramics on various steel, cermet and ceramics in molten zinc using a homemade testing machine were evaluated to search and develope proper materials.
The results can be sammarized as follows :
(1) Corrosion resistance of steel and cermet is low especially in moving bath. However, ceramics show excellent corrosion resistance.
(2) Friction coefficient of steel is low, that of cermet scatters from as same level as steel to 1.5 times higher by sort and amount of metal included. Friction coefficient of ceramics with carbon is low but without carbon is high.
(3) Amount of wear loss scatters widely based on materials and composition. Wear loss is low in ceramics with carbon and high in without carbon, that of steel and cermet is placed in the middle.
(4) Ceramics with solid-lubricative property must be used at least one side of bearings at present. However, wettable ceramics against molten metal are of great promise.