Posted by Gordon England on June 02, 2003 at 11:46:19:
In Reply to: test of Zinc metallized surface posted by Sandeep Jaikishen on May 26, 2003 at 11:39:15:
: Dear Sir
: we had specified High grade Zinc (Zn 99.95%) for metallization for our LPG cylinders.
: We receive Zinc metallized and painted cylinders for online testing. What are the tests we can conduct on cylinders ( can be Destructive also) to ensure the quality of Zinc metallization.
: Is their any tests available to identify if PW grade Zinc (Zn 98.5%) is used for Zinc metallization.
: Regards
: Sandeep jaikishen
Hi Sandeep
Non-destructive tests would be limited to general visual inspection and coating thickness measurements.
Destructive tests could include:
Coating bond strength using glue on dollies and pull-off tester.
Scribe-grid test.
Metallography.
Accelerated corrosion test.
Chemical analysis of coating.
Regards Gordon
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