Corrosion Resistant of Inorganic Coating for 50CrVA Spring Steel at Elevated Temperatures
An inorganic coating on 50CrVA spring steel was successfully fabricated by a simple and low-cost spraying technique, using bauxite, silicon carbide, sodium silicate, feldspar and phosphate binders. Experimental results showed that the weight gain of coated specimen was reduced by 67.82% and the decarburization layer of coated specimen disappeared completely at 1050°C holding for 120 min. The coating showed a reduction in decarburization of 100% at 1050°C holding for 120 min. It suggests that the coating prevented the decarburization during high-temperature treatment.
50CrVA spring steel, inorganic coatings, decarburization and oxidation, corrosion resistant
Xiaomeng ZHANG (1), Lianqi WEI (1), Xiaojing WANG (1,2) Guoyan FU (1,2) Ziyi LIU (1,3) Bo YU (1,2) and Shufeng YE (1)
1) State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, P. O. BOX 353, Beijing, 100190 China.
2) Graduate University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing, 100049 China.
3) School of Architecture, Hebei University of Engineering, No. 199 Bright South Street, Handan, 056038 China.
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ISIJ International, Vol. 57, No. 4, 2017, pp. 730-736