Novel Al-Sn-Bi anodes with and without lanthanum （La） were prepared.To evaluate the corrosion properties of the anodes,constant current and dynamic loop tests were carried out to determine its efficiency and corrosi...Novel Al-Sn-Bi anodes with and without lanthanum （La） were prepared.To evaluate the corrosion properties of the anodes,constant current and dynamic loop tests were carried out to determine its efficiency and corrosion rate.Optical microscopy （OM）,transmission electron microscopy （TEM） and energy spectrum analysis techniques were used to examine and analyze microstructure and corrosion behavior of the specimens.The result showed that the Al-Sn-Bi anodes with La additions revealed higher current efficiency and anticorrosion in artificial environment.Segregation phase of anodes with La additions got more homogenous than that without La additions.Its grains were fined and the amount of segregation Fe-phase was reduced.展开更多
The corrosion resistance of the developed 400 MPa grade rebar was evaluated by a series of experiments, including cycles of corrosion-accelerating tests in the simulated concrete pore solution and reinforced concrete ...The corrosion resistance of the developed 400 MPa grade rebar was evaluated by a series of experiments, including cycles of corrosion-accelerating tests in the simulated concrete pore solution and reinforced concrete cube corrosion-accelerating tests and in situ exposure experiments in chloride ions condition. In addition, the tensile and bending properties and the connection adaptability of the developed rebar were investigated. The results verify that the comprehensive properties of the corrosion-resistant rebar are excellent. The tensile and bending properties of the rebar are up to the standard of GB1499-2007. The common welding method and the mechanical connection technology of knob-cut roiled parallel thread splicing are suitable for the rebar.展开更多
基金the Industrial Investment Fund of General Research Institute for Non-ferrous Metals for financial support
文摘Novel Al-Sn-Bi anodes with and without lanthanum （La） were prepared.To evaluate the corrosion properties of the anodes,constant current and dynamic loop tests were carried out to determine its efficiency and corrosion rate.Optical microscopy （OM）,transmission electron microscopy （TEM） and energy spectrum analysis techniques were used to examine and analyze microstructure and corrosion behavior of the specimens.The result showed that the Al-Sn-Bi anodes with La additions revealed higher current efficiency and anticorrosion in artificial environment.Segregation phase of anodes with La additions got more homogenous than that without La additions.Its grains were fined and the amount of segregation Fe-phase was reduced.
基金Sponsored by National High-Tech Research and Development Program of China(2006AA03Z518)National KeyTechnology Research and Development Program in 11th Five-Year Plan of China(2007BAE30B05)
文摘The corrosion resistance of the developed 400 MPa grade rebar was evaluated by a series of experiments, including cycles of corrosion-accelerating tests in the simulated concrete pore solution and reinforced concrete cube corrosion-accelerating tests and in situ exposure experiments in chloride ions condition. In addition, the tensile and bending properties and the connection adaptability of the developed rebar were investigated. The results verify that the comprehensive properties of the corrosion-resistant rebar are excellent. The tensile and bending properties of the rebar are up to the standard of GB1499-2007. The common welding method and the mechanical connection technology of knob-cut roiled parallel thread splicing are suitable for the rebar.
