Sliding contacts for the pharmaceutical industry: failure analysis and dry sliding tests for the replacement of hard Cr on AISI 316L steel |
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| Affiliation: | 1. Department of Industrial Engineering, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy;2. Interdepartmental Center for Industrial Research-Advanced Mechanics and Materials (CIRI –MAM), University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy;1. Department of Physics and Materials Science, Faculty of science, Chiang Mai University, Chiang Mai 50200, Thailand;2. Department of Chemistry, Faculty of science, Chiang Mai University, Chiang Mai 50200, Thailand;3. Materials Research Center, Chiang Mai University, Chiang Mai 50200, Thailand |
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| Abstract: | Several alternatives were compared for the replacement of hard electroplated Cr coating to improve the tribological properties of the AISI 316L austenitic stainless steel for pharmaceutical packaging applications, including low temperature carburizing (LTC), thermal spray coatings (Al2O3-13TiO2, WC-17Co), substitution of the AISI 301 reference counterface with polymeric materials (PTFE, UHMWPE, PEEK). In dry sliding block on ring tests, the LTC AISI 316L cylinders lead to the lowest wear rates of the AISI301 sliders under low loads (up to 10 N). When considering the polymer vs. uncoated AISI 316L couple, PEEK and UHMWPE lead to lower friction and comparable wear rates with respect to the reference couple (AISI 301 vs. Hard Cr coated-AISI 316L) in the whole range of tested loads. |
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