Electronic smoking article

Abstract

An electronic smoking article includes a heater and a liquid aerosol formulation. The heater is a coil heater. The liquid aerosol formulation includes at least one aerosol former, optionally water, nicotine and phosphoric acid. The phosphoric acid is included in an amount sufficient to substantially abate corrosion of the heater.

1 . A method of forming a pre-vapor formulation of an electronic vaping device comprising:
 forming a pre-vapor formulation; and   adding phosphoric acid to the pre-vapor formulation in an amount ranging from about 0.1% by weight to about 5% by weight   
     
     
         2 . The method of  claim 1 , wherein the forming comprises:
 combining water and at least one vapor former.   
     
     
         3 . The method of  claim 2 , wherein the forming further comprises:
 adding nicotine to the pre-vapor formulation.   
     
     
         4 . The method of  claim 3 , wherein the adding nicotine comprises:
 adding nicotine in an amount ranging from about 1% by weight to about 10% by weight.   
     
     
         5 . The method of  claim 2 , wherein the combining water comprises:
 combining water with propylene glycol, glycerin, or both propylene glycol and glycerin.   
     
     
         6 . The method of  claim 2 , wherein the forming comprises:
 adding at least one vapor former in an amount ranging from about 40% by weight to about 90% by weight.   
     
     
         7 . The method of  claim 1 , wherein the forming comprises:
 combining glycerin and propylene glycol in a ratio of at least about 2:3.   
     
     
         8 . The method of  claim 1 , further comprising:
 adding at least one flavorant to the pre-vapor formulation.   
     
     
         9 . The method of  claim 8 , wherein the adding at least one flavorant comprises:
 adding the at least one flavorant in an amount ranging from about 2% to about 15% by weight.