Steel tank is subject to achemical process which in conjuction with the special enamel coating method - using a vacuum method - ensures a perfect mechanical adhesion. This special porcelan enamel (DURO GLASS), which is the fruit of years' of recearch and testing by ELCO, is then fired together with the steel at 860^oC, thus acquiring a perfect thermochemical adhesion. The porcelain enamel precisely follows the metal's contractions and expansions since it has the same resilience properties as the steel.
Result: The tank is absolutely protected against corrosion