What is the G3 Gas Protection Specification in Conformal coating?
Also it must be realised that you are qualifying a conformal coating and not the process. The G levels are the severity of the attack and the conformal coating is exposed to this.
The G3 specification references the ANSI Standard, ANSI/ISA S71.04-1985, “Environmental Conditions for Process Measurement and Control Systems: Airborne Contaminants,” .
The G reference refers to the severity and classification of the test and it can be G1 (Mild, Moderate, Harsh and Severe (G1, G2, G3 and Gx, respectively). The classification directly correlates with the level of corrosive effects in that environment and the standards define or characterise environments in terms of their overall corrosion potential.
Some conformal coatings have been exposed to the test it the different levels and have a pass / fail criteria.
For further information on the different levels of classification click G3 Gas Protection Specification in Conformal coating.