coat BLACK guarantees maximum service life. - 1,000 hours corrosion resistance in salt spray test under realistic conditions - More than 2,000 hours of corrosion resistance during the salt spray test under [...] in accordance with DIN EN ISO 9227 have shown that no basic metal corrosion occurs even at 1,000 hours under practical conditions, i.e. after handling and assembly. The company's consistent quality policy [...] ity, and simple handling. Our most important test criteria were: - Static leak tightness for 160 hours - Burst pressure greater than 4 times the nominal pressure - Impulse test to determine the service