In defense technology, STI Group is the worldwide market leader for chrome plating the inside of medium and large caliber barrels. The complex surface treatment of internal surfaces involves extremely demanding challenges regarding adhesive strength, durability of the layer itself (cohesion), corrosion protection, thermal protection and precision. At its locations in Watervliet NY (USA) and Steinach (CH), STI Group provides surface coating for medium and large caliber barrels.