Metal finishing Q&As since 1989
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Salt Fog Cabinet Setting for ASTM B117 vs. ISO 9227
The screw passed the NSST under ISO9227 (96H without Zn corrosion and 240H without metal corrosion), while it failed the Assembly NSST at about 96 Hours under ASTM B117.
Please coach where is the NSST Cabinet Setting difference between ASTM B117 and ISO 9227 .
product designer - Shanghai, China
February 25, 2010
Paul,
The differences between ASTM B117 and ISO9227 are relatively minor. I can't imagine how parts can pass one test while failing the other. If these have been done by the same Laboratory I would ask them what the differences were between the two tests that they carried out.
Aerospace - Yeovil, Somerset, UK
March 1, 2010
Not a shock. The screw was damaged during installation in the larger component. If it is stainless, use a high nickel low iron diver/wrench. If it is plated, be as gentle as you can and hope.
James Watts- Navarre, Florida
March 2, 2010
March 29, 2010
Dear Paul Yan,
we are not able to see that much difference between the ISO 9227 and ASTM B117
But, very important in the both a testing, you followed all the parameters in exact not.
For example angle, salt conc., Air pressure, etc ... in both a process.
- Salem, Tamil Nadu, India
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