The corrosion prevention of steel bars is a current concern of all countries in the world.Every year,a large number of economic losses will be caused due to corrosion of steel bars.The exposed steel bars of reinforced concrete prefabricated components will be eroded by ...MORE The corrosion prevention of steel bars is a current concern of all countries in the world.Every year,a large number of economic losses will be caused due to corrosion of steel bars.The exposed steel bars of reinforced concrete prefabricated components will be eroded by industrial atmosphere,rain,etc.before they are deliv...