Nogas

Our range of Nogas is briquette for plunging into Copper & Copper alloys to remove Hydrogen Gas. The solubility of hydrogen in copper and copper-base alloys decreases appreciably as the metal cools from the liquid to the solid phase. The metals normally alloyed with copper have varied effects on the solubility of hydrogen in copper.
Aluminium, zinc and tin additions decreases the solubility of hydrogen, while nickel additions increases it. Where solidification occurs over a range of temperature, the decrease in solubility from liquidus to the solidus is distributed over that range. The gas dissolved in the molten metal diffuses during solidification into the remaining interdendritic pools of liquid until, when these solidify, it is ejected as gas bubbles to form the familiar interdendritic gas porosity.
Thus, NOGAS is a must use to prevent gas porosity defects arising due to Hydrogen Gas.
Usage-
NOGAS briquettes are convenient to apply and most effective in removing dissolved hydrogen from molten copper and its alloys. A compacted degassing briquette is plunged beneath the metal surface to release a stream of scavenging gases from the decomposition which ensues. The scavenging gases do not produce any objectionable or toxic fumes and the only equipment required is a suitably protected plunger rod.
NOGAS is supplied as strong, robust briquettes that can be safely and easily stored, handled and applied.