Abstract
In the present study, a zinc phosphate conversion coating was successfully deposited onto steel fiber surface to improve the corrosion resistance of steel fiber reinforced concrete. An understanding of phosphating temperature–coating properties was established through potentiodynamic polarization curves and electrochemical impedance spectroscopy analysis, in conjunction with scanning electron microscope (SEM) and X-ray diffraction (XRD). The results showed that increasing the phosphating temperature could promote the formation of coating, the best bath efficiency and corrosion behavior was observed at 75 °C. Also, the potential-time curves during phosphate treatment were used to elucidate the mechanism of film formation, and indicated that higher temperatures minimized the time of film formation. But at higher phosphating temperature (85 °C) was detrimental in causing matrix corrosion and grain growth. This lead to increase of porosity and decrease of corrosion resistance. Furthermore, the corrosion behavior, interface properties and bending toughness of zinc phosphate coated steel fiber-reinforced concrete in 3.5% NaCl solution was investigated and compared with general steel fiber concrete.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
