DIN 4753-3:2011 饮用水热水器,水加热装置和贮水式热水器.第3部分:通过上釉和阴极保护对触水面进行防腐保护的要求和试验
Water heaters, water heating installations and storage water heaters for drinking water - Part 3: Corrosion protection on the water side by enamelling and cathodic protection - Requirements and testing