Material Analysis and Molecular Dynamics Simulation for Cavitation Erosion and Corrosion Suppression in Water Hydraulic Valves

Masoud Kamoleka Mlela; He Xu; Feng Sun; Haihang Wang; Gabriel Donald Madenge

doi:10.3390/ma13020453

Material Analysis and Molecular Dynamics Simulation for Cavitation Erosion and Corrosion Suppression in Water Hydraulic Valves

Materials (Basel). 2020 Jan 17;13(2):453. doi: 10.3390/ma13020453.

Authors

Masoud Kamoleka Mlela¹, He Xu¹, Feng Sun¹, Haihang Wang¹, Gabriel Donald Madenge²

Affiliations

¹ College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China.
² College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.

Abstract

In the milestone of straggling to make water hydraulics more advantageous, the choice of coating polymer for water hydraulics valves plays an essential role in alleviating the impact of cavitation erosion and corrosion, and this is a critical task for designers. Fulfilling the appropriate selection, we conflicted properties that are vital for erosion and corrosion inhibitors, as well as the tribology in the sense of coefficient of friction. This article aimed to choose the best alternative polymer for coating on the selected substrate, that is, Cr₂O₃, Al₂O₃, T_i2O₃. By applying PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluations), the best polymer obtained with an analyzed performance attribute is Polytetrafluoroethylene (PTFE) that comes up with higher outranking (0.5932052). A Molecular Dynamics (MD) simulation was conducted to identify the stronger bonding with the regards of the better cleave plane between Polytetrafluoroethylene (PTFE) and the selected substrate. Polytetrafluoroethylene (PTFE)/Al₂O₃ cleaved in (010) plane was observed to be the strongest bond in terms of binding energy (3188 kJ/mol) suitable for further studies.

Keywords: cavitation; coating selection; corrosion; erosion; molecular dynamics; polymer; water hydraulic valve.