Corrosion & Humidity Test

Purpose
- Identifying gross corrosion and adhesion issues of individual   parts used in the disk drive
- Accelerating the corrosion reactions which can occur during the   expected lifetime of the disk drive
- Insuring the compatibility and integrity of parts within the disk   drive during exposure to elevated temperature and humidity.

Equipment
- Environmental chamber
- A source of deionized water with a measured resistivity greater   than 18 Megaohm-cm at 25 oC.
- Optical light microscope

Testing Procedure
- Position the samples within the chamber.
- Program the test profile of temperature and humidity for the run   on the environmental test chamber and start the test run.
- After the run, open the chamber doors and remove the samples

Examination of Tested Samples
- The test samples should be examined as soon as possible   following removal from the environmental chamber.
- The inspection of these parts will be performed with the use of   an intense light and an optical light microscope.
- All observations are to be recorded.
- Any contamination, discoloration or other irregularities counld
  be characterized by SEM / EDS, ion chromatography, a surface   analytical spectroscopy, or other analytical probe.

For more details, please refer to IDEMA standard Environmental Testing for Corrosion Resistance and for Component Compatibility

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