Effects of passivation on the properties of Ni-P alloy coating deposited on CFs reinforced PEEK

• Published in: Surface & coatings technology Vol. 232; pp. 269 - 274
• Main Authors: Zhou, Baiyu, Kong, Lingwei, Niu, Liyuan, Lian, Jianshe, Li, Guangyu
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2013; Elsevier
• Subjects: Applied sciences; Coating; Corrosion; Corrosion environments; Corrosion resistance; Cross-disciplinary physics: materials science; rheology; Deposition; Electroless deposition; Electromagnetic interference; Electromagnetic interference shielding effectiveness; Exact sciences and technology; Materials science; Metallic coatings; Metals. Metallurgy; Nickel base alloys; Oxidation; Oxidation behavior; Passivation; Physics; Polyetheretherketones; Production techniques; Surface treatment; Surface treatments; X-rays; Corrosion resistance; Oxidation behavior; Electromagnetic interference shielding effectiveness; Electroless deposition; Passivation; Nickel base alloys; Surface treatments; Shielding; Electromagnetic shielding; Metal coating; Corrosion; Chemical deposition; Oxidation
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2013.05.031

Electroless Ni-P alloy coating was deposited on carbon fibers (CFs) reinforced polyether ether ketone (PEEK), and a transparent passive film was formed on it. Effects of passivation on the oxidation behavior and electromagnetic interference shielding effectiveness (EMI SE) of Ni-P alloy coatings were investigated. The phase structure of the Ni-P coating was investigated by X-ray diffractometry (XRD). Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) showed that dense and uniform nodules presented in the coating, and chromate (VI) passive film formed onto Ni-P alloy coating. Electrochemical tests showed that passivation improved the corrosion resistance and delayed the oxidation of the Ni-P alloy coating. The EMI SE test proved that the passivation enhanced EMI SE greatly because passive film effectively restrained the oxidation of the Ni-P alloy coating. All the data proved that the passivated Ni-P alloy coating to be potential shielding material under oxidation environment. •A passive Ni-P coating was electrolessly formed on PEEK.•Passivated coating exhibits better corrosion resistance than as-plated coating.•The oxidation resistance was improved after passivation.•Passivated coating presents superior EMI SE after oxidation.