MFG tests are not normally used as porosity tests or where the failure mechanism is other than pollutant gas corrosion.Cross References:ISO 10308ISO 3696:1987ISO 4221:1980ISO 4677-1:1985ISO 4677-2:1985ISO 6349:1979ISO 6767:1990ISO 7934:1989ISO 7996:1985ISO 9096:1992ISO 10313:1993ISO 12687:1996IEC 60050