1 It needs to be judged according to the specific passivation structure.
2 Top passivation structure refers to the reinforced concrete structure, the part of the exposed surface of the steel bar will be coated with a layer of anti-rust material, which forms the passivation layer.
Top passivation structure refers to the top of the concrete, the exposed part of the steel bar will also be coated with rust prevention material.
The method of judging the passivation structure of the top can be started from the following aspects: First, by observing the exposed part of the steel bar on the top of the concrete, check whether there is coating; Secondly, it can be determined whether it is a top passivation structure by checking the quality and thickness of the coating; Finally, it is also possible to confirm whether the top passivation structure is used by asking the construction or design party.
3 The application of top passivation structure can effectively prevent steel corrosion and improve the corrosion resistance and service life of concrete structure.