複合サイクル腐食試験における有機複合綱板の耐食性機構 Mechanism of Corrosion Resistance in Organic Composite Coated Steel Sheet during Cyclic Corrosion Test

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Organic composite coated steel sheets (OCC) show excellent corrosion resistance during cyclic corrosion tests (CCT). To clarify the mechanism behind this corrosion resistance, we studied changes in corrosion products and elements of plating, chromate, and organic resin layers of OCC with different organic resin layer weights. Larger amounts of corrosion products were detected on OCC with a smaller weight organic resin layer. Larger amounts of basic zinc chloride [ZnCl<sub>2</sub>·4Zn(OH)<sub>2</sub>] forming under the organic resin layer were detected by X-ray diffraction and electron probe microanalysis (EPMA) on OCC with a larger weight organic resin layer. Chromium remained in the chromate layer longer in OCC having the larger weight organic resin layer. The contribution of the corrosion products on the organic resin layer, the organic resin layer, the basic zinc chloride under the organic resin layer and the chromate layer to resistance was estimated by AC impedance measurements. That of the basic zinc chloride under the organic resin layer and the chromate layer was largest, followed by that of the organic resin layer. The excellent corrosion resistance of OCC therefore depends on the high barrier of the corrosion products on the organic resin layer and the ability to maintain the chromate layer and the basic zinc chloride under the organic resin layer in a corrosive environment.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 50(2), 218-244, 1999-02-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002111938
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4658205
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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