RE: Effect of weather on deposition efficiency
Pressure in bottle drops due to temp going down. apply Bernouilly factor correction. Powder get moisture also. Preheat them.
Moisture of the air cool the flame and reduce efficency.
For some critical operations, sometimes a 1 % parameter variation can affect 30% of the coating. This is the reason some users have several rooms heated. this effect is known 40 years ago by previous thermal spray users. You must compensate the energy drop at the gun but also in the environnement (spray room temperature, preheating the substrate)
|