Influence of pH of Phosphating Bath on the Zinc Phosphate Coating on AZ91D Magnesium Alloy

Influence of pH of Phosphating Bath on the Zinc Phosphate Coating on AZ91D Magnesium Alloy

Suitable pH of the phosphating bath is crucial to restrain resolving rate of magnesium and obtain high quality phosphate coatings because of the high activity of magnesium. In this investigation a compact zinc phosphate coatings on AZ91D were successfully obtained from the phosphating bath with pH=2...

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Veröffentlicht in:Advanced engineering materials 2006-02, Vol.8 (1-2), p.123-127
Hauptverfasser: Li, G. Y., Lian, J. S., Niu, L. Y., Jiang, Z. H.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Coating
Corrosion
Exact sciences and technology
Magnesium
Metals. Metallurgy
Nonmetallic coatings
Production techniques
Surface treatment
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Zusammenfassung:Suitable pH of the phosphating bath is crucial to restrain resolving rate of magnesium and obtain high quality phosphate coatings because of the high activity of magnesium. In this investigation a compact zinc phosphate coatings on AZ91D were successfully obtained from the phosphating bath with pH=2.15∼2.5. This figure indicated that the slab‐like phosphate crystals were entirely covered the substrate when the pH of the phosphating bath is 2.5.
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.200500095