{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,20]],"date-time":"2026-01-20T00:07:17Z","timestamp":1768867637815,"version":"3.49.0"},"reference-count":40,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T00:00:00Z","timestamp":1768780800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Major Research and Development Projects of Longmen Laboratory"},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52401045"],"award-info":[{"award-number":["52401045"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Key Research and Development Project of Henan Province","award":["251111231100"],"award-info":[{"award-number":["251111231100"]}]},{"DOI":"10.13039\/501100006407","name":"Natural Science Foundation of Henan Province","doi-asserted-by":"publisher","award":["252300421339"],"award-info":[{"award-number":["252300421339"]}],"id":[{"id":"10.13039\/501100006407","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Copper slag was introduced as a second phase into Cr3C2\u2013NiCr coating to improve corrosion resistance and reduce material cost. Composite coatings with different copper slag\/Cr3C2\u2013NiCr ratios were prepared by high-velocity oxygen fuel (HVOF) spraying. The corrosion behavior was evaluated through electrochemical tests and immersion experiments, and the effect of coating composition on corrosion resistance was elucidated by microstructural and compositional analysis. To increase the addition of copper slag, the open-circuit potential of the coatings shifted positively, the corrosion current density decreased significantly, and both the polarization resistance and charge-transfer resistance increased markedly, leading to a notable reduction in corrosion rate. The coating with a copper slag-to-Cr3C2\u2013NiCr mass ratio of 3:7 exhibited the best corrosion resistance. The improvement can be attributed to the reduced porosity and more compact structure resulting from the copper slag addition, as well as the homogeneous distribution of copper slag, which enhances the stability of the surface passivation layer.<\/jats:p>","DOI":"10.3390\/ma19020395","type":"journal-article","created":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T11:35:27Z","timestamp":1768822527000},"page":"395","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Study on the Corrosion Resistance of Copper Slag\/Cr3C2-NiCr Composite Coating"],"prefix":"10.3390","volume":"19","author":[{"given":"Jiaran","family":"Du","sequence":"first","affiliation":[{"name":"School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-9606-3269","authenticated-orcid":false,"given":"Dongliang","family":"Jin","sequence":"additional","affiliation":[{"name":"Longmen Laboratory, Luoyang 471000, China"},{"name":"National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan University of Science and Technology, Luoyang 471003, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nan","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0099-4530","authenticated-orcid":false,"given":"Zhengxian","family":"Di","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Special Protective Materials, Luoyang Institute of Science and Technology, Luoyang 471023, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8933-4557","authenticated-orcid":false,"given":"Xiqiang","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471000, China"},{"name":"Longmen Laboratory, Luoyang 471000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"147943","DOI":"10.1016\/j.electacta.2025.147943","article-title":"Temperature-pressure-flow rate synergy effect on corrosion behavior of supercritical CO2 pipelines: Optimal conditions and FeCO3 film mechanism","volume":"548","author":"Liu","year":"2026","journal-title":"Electrochim. 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