The invention relates to an electrohydraulic forming chamber (10) for forming a workpiece (50), said chamber comprising: - a discharge frame (20) that has an inner wall (21) which delimits a discharge space (22) provided for holding a volume of fluid; - a female mold (30) comprising a forming space (32) which includes an impression (31) designed to be complementary to the shape that the workpiece is to have after being deformed; - an electrohydraulic discharge system (40); the workpiece (50) is to be placed between the discharge space (22) and the forming space (32) before the electrohydraulic discharge system is activated; as the electrohydraulic discharge system is activated, the workpiece (50) is catapulted against the impression (31) in the forming space (32) and is deformed accordingly. According to the invention, all or part of the inner wall (21) is provided with a non-metal coating (24).