... antirust powder designed for the corrosion protection of self-seal system. VCI powder,SF/D-331 is watersoluble, spayable volatile ... for the corrosion protection of self-seal system (e.g. tubular structure and pipes) and metals in the enclosed space. SF/D ... , engines, tanks, boilers, heat exchangesl Steam cooling pipe, close cycle heating and cooling systeml Internal surface of tested structure during ...