Effects of Sintering Temperature on Microstructure and Properties of Enamel Coatings on Q235 Steel

被引：4

作者：

Li Cuixia ^{[1
]}

Qu Xuewei ^{[1
]}

Li Wensheng ^{[1
]}

Feng Li ^{[1
]}

Elena, Yatsenko ^{[2
]}

Yang Xiaoyong ^{[1
]}

机构：

[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

[2] Platov South Russian State Polytech Univ NPI, Dept Gen Chem & Technol Silicates, Novocherkassk 346428, Russia

来源：

CHINA SURFACE ENGINEERING | 2020年 / 33卷 / 04期

基金：

中国国家自然科学基金;

关键词：

sintering temperature; porosity; interfacial oxide layer; Fe-rich dendrite; ADHERENCE; RESISTANCE;

D O I：

10.11933/j.issn.1007-9289.20190629001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The enamel coatings sintered at 700-900 degrees C were prepared on the surface of Q235 low carbon steel by one-time coating enamel method. Phase composition, morphology, micro-area composition, mechanical properties and corrosion behavior of enamel coatings were investigated by XRD, SEM, EDS, micro Vickers hardness tester, ball dropping device and electrochemical workstation. Results show that the surface porosity decreases gradually, while the cross-section porosity decreases at first, then increases and final decreases during the sintering process. The grinding additive quartz dissolves gradually in the silicon-oxygen tetrahedron [SiO4] network of the coating, which improves the micro-hardness and gloss of coating. The oxide layer at the interface between coating and matrix decreases and disappears eventually, while the diffusion zone of Fe enlarges gradually, and a dendrite-rich of Fe-Co and Fe-Ni dendrite layer is formed. The formation of enamel layer and the closure of internal corrosive channels of the coating significantly improve the corrosion resistance.

引用

页码：160 / 168

页数：9

共 23 条

[1]

Bachar A., 2017, J. Mater. Environ. Sci., V8, P3884

[2] ROLE OF ADHERENCE OXIDES IN DEVELOPMENT OF CHEMICAL BONDING AT GLASS-METAL INTERFACES [J].