Authors: Ngo Xuan Cuong, Le Thu Quy, Nguyen Tuan Anh, Do Thanh Tung – Key Laboratory of Welding Technology and Surface Treatment – National Research Institute of Mechanical Engineering;  Institute of Tropical Engineering – Vietnam Academy of Science and Technology 

Published in: Proceedings of the National Scientific Conference on Hydraulic Machinery and Automation Systems 2021

Publication date: 2021

Abstract: This paper presents the research results on fabricating an NBR rubber coating on the pump chamber. There are three process parameters for fabricating the NBR rubber coating on a steel substrate: vulcanization temperature of 135°C, pressure applied to the rubber surface of 30 kgf/cm², and vulcanization time of 30 minutes. The mechanical properties of the obtained rubber coating include: tensile strength of 11.8 MPa; elongation at break of 530%; permanent set of 33.2%; hardness of 66 ShoreA; abrasion resistance of 1.78 cm³ / 1.61 km; peel strength of 7.5 MPa and shear strength of 18.8 MPa. The obtained results indicate the potential for applying this technological solution to effectively protect against corrosion for sand pump chambers and mineral slurry pump chambers.

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