... 331 is watersoluble, spayable volatile corrosion inhibiting powder designed for the corrosion protection of self-seal system (e.g. ... of tubular structure, pipe and vessel, etcl Internal surface of compressors, turbines, engines, tanks, boilers, heat exchangesl Steam cooling ... sandblasting system or hand blast can also be used. For powder application, with average environmental condition, use 100g/m2 ...