Electrochemical and Tribological Properties of TiSiCN Coatings in Coolant

Abstract

TiSiCN coatings were prepared using DC and RF magnetron co-sputtering system. The influence of target powers on phase structures, mechanical properties, tribological and electrochemical properties were studied. The results indicated the coatings presented an amorphous structure, and the highest microhardness of 1566.4 HV was obtained at a target power of 200 W. In terms of the electrochemical properties in coolant, the higher charge transfer resistance of 2.64 × 10 7 Ωcm 2 and the polarization resistance (~1.10 × 10 8 kΩ.cm 2) were obtained at low target power, indicating a better corrosion resistance. Furthermore, the friction coefficient was 1.01 ~ 1.14 as sliding against SUS440C balls in air. In contrast, the friction coefficient decreased to 0.45 ~ 0.58 in coolant, and the wear mechanism changed from oxidation wear into abrasive wear.

Investigation on Performance of Hydraulically Expanded Joint of Titanium–Steel Clad Tubesheet

“…Titanium is an alloy with low density, high strength, and strong corrosion resistance, which is widely used in the chemical industry, marine ships, aviation, medical instruments, automotive industry, livelihood supplies, and other fields [ 1 , 2 ]. Because of its good economic and applicability, titanium-steel clad tubeplate structures are applied in titanium shells and tube heat exchangers.…”