目前在城乡给水系统中,怎样防止金属材料的蚀腐,延长其使用寿命,已成为日益突出的问题。为此国内外进行了多种涂膜隔绝与防腐衬里的措施,仅管道内壁衬涂水泥 At present, in urban and rural water supply systems, how to prevent corrosion of metal materials and prolong their service life has become an increasingly prominent problem. To this end, a variety of measures have been taken at home and abroad for the isolation of coatings and anti-corrosion linings.