Improving of 100Cr6 Steel Corrosion and Wear Properties in Simulated Sea Water Environment by Tungsten-Doped DLC Coating

Martin Vicen; Daniel Kajánek; Libor Trško; Otakar Bokůvka; Martin Buchtík; Zuzana Florková; Martin Frkáň

doi:10.3390/ma16124334

Improving of 100Cr6 Steel Corrosion and Wear Properties in Simulated Sea Water Environment by Tungsten-Doped DLC Coating

Materials (Basel). 2023 Jun 12;16(12):4334. doi: 10.3390/ma16124334.

Authors

Martin Vicen¹, Daniel Kajánek², Libor Trško², Otakar Bokůvka^{1

2}, Martin Buchtík³, Zuzana Florková², Martin Frkáň⁴

Affiliations

¹ Department of Materials Engineering, Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 010 26 Zilina, Slovakia.
² Research Centre, University of Zilina, Univerzitná 8215/1, 010 26 Zilina, Slovakia.
³ Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic.
⁴ Staton, s. r. o., Sadová 1148, 038 53 Turany, Slovakia.

Abstract

A progressive type of tungsten-doped DLC coating was applied to a quenched and tempered 100Cr6 steel with the aim to improve the wear and corrosion properties in simulated seawater conditions and to compare the performance to conventional DLC coating. Tungsten doping caused a shift of the corrosion potential (E_corr) to a lower negative value of -172 mV, while the conventional DLC exhibited an E_corr of -477 mV. In dry conditions, the W-DLC coefficient of friction is slightly higher than that of the conventional DLC (0.187 for the W-DLC vs. 0.137 for the DLC), but in cases of a saltwater environment, this difference becomes almost negligible (0.105 for the W-DLC vs. 0.076 for the DLC). The conventional DLC coating also started to show marks of deterioration when exposed to a combination of wear in a corrosive environment, while the W-DLC layer still maintained its integrity.

Keywords: DLC coating; W-DLC coating; corrosion resistance; tribology; wear.

Abstract

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