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The Effect of Conversion Coated and Plated Components on the Corrosion of Cobalt Alloy Magnetic Disks / K. Goodson, R. Cormia

Conference Author
Corrosion of Electronic and Magnetic Materials (1990 : San Francisco, California)
Physical Description
1 online resource (10 pages) : illustrations, figures, tables
Additional Creators
Cormia, R., Goodson, K., American Society for Testing and Materials, and ASTM International
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Summary
Common disk drive components with chromate conversion coatings or electroless nickel platings were analyzed by ion chromatography for residual levels of Cl-, F-, SO42-, and NO3-. Extraction with boiling DI water revealed levels up to several hundred ng/cm2 for these anions. When these components were placed 2 mm under a suspended cobalt-nickel-phosphorous disk in an environmental chamber at 55¿̐ưC/85% RH, corrosion of the cobalt disk occurred directly over the chromated component when the total level of anions was greater than 200 ng/cm2. This accelerated corrosion did not occur in a 120-h test when the level was less than 50 ng/cm2. The amount of corrosion was found to be dependent on the separation distance between the disk and the chromated component.
Dates of Publication and/or Sequential Designation
Volume 1992, Issue 1148 (January 1992)
Subject(s)
Other Subject(s)
ISBN
0803114702
9780803114708
9780803152052 (e-ISBN)
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 14.
Other Forms
Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1992. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
View MARC record | catkey: 28007770