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About This Item
Full Description
1.1 This practice covers a guide for metal finishers to clean and then provide a paint base for the finishing of magnesium and magnesium alloys using chemical conversion coatings. Where applicable (for example, aerospace) secondary supplementary coatings (for example, surface sealing) can be used (see Appendix X1).
1.2 Although primarily intended as a base for paint, chemical conversion coatings provide varying degrees of surface protection for magnesium parts exposed to indoor atmosphere either in storage or in service under mild exposure conditions. An example is the extensive use of the dichromate treatment (see 5.2) as a final coating for machined surfaces of die cast magnesium components in the computer industry.
Document History
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ASTM B879-17(2022)
Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Most Recent
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ASTM B879-17
Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Historical Version
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ASTM B879-97(2013)
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Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Historical Version
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ASTM B879-97(2008)e1
Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Historical Version
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ASTM B879-97(2003)e1
Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Historical Version
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ASTM B879-97
Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys- Historical Version