AlFeCrNiMo　high　entropy　alloy　(HEA)　coatings　were　successfully　fabricated　on　the　surface　of　304　stainless　steel　(304SS)　by　the　magnetron　sputtering　technology.　The　microstructure,　hardness　and　tribocorrosion　behaviors　of　304SS　and　AlFeCrNiMo　HEA　coatings　were　systematically　investigated　to　obtain　a　comprehensive　understanding　of　the　tribocorrosion　behaviors　in　artificial　seawater　in　the　present　work.　Experimental　results　showed　that　AlFeCrNiMo　HEA　coatings　have　BCC　crystal　structure.　And　the　hardness,　corrosion　resistance　and　tribocorrosion　behaviors　of　304SS　are　improved　by　HEA　coatings.　Those　improvements　are　attributed　to　the　synthesis　effects　of　BCC　structure,　solid　solution　strengthening　and　the　formation　of　the　oxide　films.　The　wear　mechanisms　of　304SS　and　HEA　coatings　are　abrasive　wear　and　oxidative　wear,　respectively.　The　comparison　study　of　the　tribocorrosion　behaviors　between　HEA　coatings　and　304SS　indicates　that　HEA　coatings　are　good　candidates　as　tribocorrosion-resistant　coatings　in　artificial　seawater,　such　as　in　the　marine　industry.　©　2020　Elsevier　Ltd