Structure and Corrosion Resistance Characteristics of ZnAl/EP Coating on Bonded NdFeB Magnet

Yang, Youwen; Jiang, Nan; Sun, Yingzhong; Yang, Lei; Guan, Chuanhai; Zhang, Enhua; Fang, Xiaogang; Liu, Jiguang

doi:10.1007/s11665-022-07472-2

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…The final procedure was solidification by infrared heating at 230 °C for 45 min. SEM micrographs revealed densely packed flakes of Zn and Al of irregular shape and size, as well as smaller The Al flakes may be replaced with Zn and Al powder, as reported by Yang et al [17]. The authors sprayed Zn and Al powder together with silane.…”

Section: Deposition Of Metallic Coatingsmentioning

confidence: 51%

“…The aluminum coating was compact enough to prevent the diffusion of chlorine into the NdFeB for the first tens of hours, but the authors explained the corrosion after prolonged treatment in the test chamber by the conversion of Al oxides into chlorides, resulting in the failure of the Al film after prolonged testing times. The corrosion rate was estimated by measuring the weight loss, and it was almost an order of magnitude lower for Al-coated than for uncoated NdFeB magnets after 200 h. The method reported by Gao et al [16] is illustrated in Figure 5 The Al flakes may be replaced with Zn and Al powder, as reported by Yang et al [17]. The authors sprayed Zn and Al powder together with silane.…”

Section: Deposition Of Metallic Coatingsmentioning

confidence: 92%

“…The Al flakes may be replaced with Zn and Al powder, as reported by Yang et al [ 17 ]. The authors sprayed Zn and Al powder together with silane.…”

Section: Scientific Literaturementioning

confidence: 99%

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Recent Advances in Corrosion Inhibition of Bonded NdFeB Magnets

Primc,

Mozetič

2024

Materials

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Bonded permanent NdFeB magnets are useful in numerous applications, including electric vehicles, and the demand is steadily increasing. A major drawback is corrosion due to inadequate wetting of the magnetic particles by liquid polymers such as polyphenylene sulfide or polyamide. Recently reported methods for corrosion inhibition are summarized, and their applicability is critically evaluated. The phosphorylation of magnetic particles inhibits corrosion but does not enable appropriate properties in harsh environments. The same applies to metallic coatings, which usually contain aluminum and zinc. Advanced epoxy adhesives are a promising solution, although some authors have reported inadequate corrosion resistance. The application of composite coatings seems like an appropriate solution, but the exact mechanisms are yet to be studied.

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Section: Deposition Of Metallic Coatingsmentioning

confidence: 51%

Section: Deposition Of Metallic Coatingsmentioning

confidence: 92%