CST (previously A.O. Smith) 1st identified the methodology of controlling corrosion by fusing glass to steel in the 1930s. The technology was in the beginning Utilized in the brewing and sizzling water heater industries. Whether this technology is new for you or not, glass-lined steel is not new; it's existed https://www.facebook.com/permalink.php?story_fbid=pfbid02E3TWTUy9Eu9quy6Lm13V7svM7cQfxNrgoCRvWpjv2eCmBT6BkFSQmtuQ3qp3vRXBl&id=61560512640678&__cft__[0]=AZXfDEcRapk5Ie2ZJu5EFiIBXOx7cuJYzrDAAVwDjicYHia3BrrEqzUUsCUwkD9McvxjMPjRzogCOVasvZhHyY2GR3XDG6hc347XAz5IEqAFzG6u0LC2UHo6pcxMGgJma1EvPzC9OMRz_0brnjTEAToCbJ8anYTmKca7n9USiOERbVTU2DcDea8cYwAKOAiW9A1fEJJ9gVfzwCGqNcuMJvao&__tn__=%2CO%2CP-R