porosity in bronze wire spray

[KevGarty]

Hi folks

We are spraying some bronze through a 14e. (Metco spray bronze aa) parameters are straight out of the metco book surface is flat manipulating the gun by hand and when coating is milled it is full of porosity

Tried different machining methods etc but nothing seems to work. Any tips or ideas ? Wire stick out is around 8mm out the front of the air cap. Spray distance is about 150

Cheers

Kev

[shantanu]

Hi folks

We are spraying some bronze through a 14e. (Metco spray bronze aa) parameters are straight out of the metco book surface is flat manipulating the gun by hand and when coating is milled it is full of porosity

Tried different machining methods etc but nothing seems to work. Any tips or ideas ? Wire stick out is around 8mm out the front of the air cap. Spray distance is about 150

Cheers

Kev

I would do the following:

1. Check for spray nozzle diameter and ensure its right
2. Decrease in the oxygen in the OXY-Acetylene flame
3. Increase air pressure

Spraying manually on flat surface is always a challenge

Regards

Shantanu