Study on Abrasion of Si Doped CrAlSiN Coating in Seawater Environment
CrAlSiN coatings with different silicon contents were prepared on 316L stainless steel and monocrystalline silicon by multi-arc ion plating technique.The microstructure and composition of the coatings were characterized by SEM and XRD.The friction and wear properties of the coatings in seawater were tested by Rect friction and wear testing machine.The results show that Cr/CrAlSiN coating mainly consists of CrN phase,AlN phase and amorphous Si3N4 coated CrN and AlN phase,and the preferred orientation of {111} is the most obvious.In seawater environment,the friction coefficient of Cr/CrAlSiN coating decreases first and then increases with the increase of silicon content at open circuit potential.When Si content is 5.5%,the average friction coefficient is 0.145.The self-corrosion potential is-0.197 V,the self-corrosion current density is 0.742 μA/cm2,and the corrosion resistance is good.
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