The addition of Ni element into steel to prolong the service life of coated steel was investigated in marine atmospheric environment by laboratory simulated accelerated experiment.The scanning electron microscope and ...The addition of Ni element into steel to prolong the service life of coated steel was investigated in marine atmospheric environment by laboratory simulated accelerated experiment.The scanning electron microscope and electron probe microanalysis combined with electrochemical impedance spectroscopy were used to characterize coated steel properties and examined the anti-corrosion performance.The results showed that 3 wt.%Ni-advanced steel(3Ni steel)substrate obviously delayed the failure time of coating compared to carbon steel,therefore prolonging the service life of coating on the steel.X-ray diffraction patterns for the corrosion products under the scratched coating on 3Ni steel exhibited that FeNi_(2)O_(4) and Fe_(2)O_(3) occurred in the corrosion product of 3Ni steel.It was also found that Ni element enriched in the product layer through analyzing the appearance and composition of corrosion products by electron probe micro-analysis.Chloride ions were blocked out of product by the enrichment of Ni element in rust layer.展开更多
Ni-advanced weathering steel is an alternative for application in marine atmospheres.The increase in Ni content makes Ni-advanced weathering steel have a more unique rust layer than conventional weathering steel.Howev...Ni-advanced weathering steel is an alternative for application in marine atmospheres.The increase in Ni content makes Ni-advanced weathering steel have a more unique rust layer than conventional weathering steel.However,unpainted Ni-advanced weathering steel is not suitable for marine environments with high levels of salinity because a protective rust layer does not form in such environments.This paper has systematically introduced the corrosion-resistance mechanism and the corrosion behavior of Ni-advanced weathering steel in marine atmospheres.Considering the lack of corrosion resistance in harsh environments and the required strength and toughness related to the engineering demand,this work provides some suggestions to optimize the composition and organization of Ni-advanced weathering steel to improve its comprehensive properties.展开更多
基金National Key Research and Development Program of China(2016YFC0401205).
文摘The addition of Ni element into steel to prolong the service life of coated steel was investigated in marine atmospheric environment by laboratory simulated accelerated experiment.The scanning electron microscope and electron probe microanalysis combined with electrochemical impedance spectroscopy were used to characterize coated steel properties and examined the anti-corrosion performance.The results showed that 3 wt.%Ni-advanced steel(3Ni steel)substrate obviously delayed the failure time of coating compared to carbon steel,therefore prolonging the service life of coating on the steel.X-ray diffraction patterns for the corrosion products under the scratched coating on 3Ni steel exhibited that FeNi_(2)O_(4) and Fe_(2)O_(3) occurred in the corrosion product of 3Ni steel.It was also found that Ni element enriched in the product layer through analyzing the appearance and composition of corrosion products by electron probe micro-analysis.Chloride ions were blocked out of product by the enrichment of Ni element in rust layer.
基金the financial support of the National Material Corrosion and Protection Scientific Data Centerthe National Natural Science Foundation of China(No.51871024)
文摘Ni-advanced weathering steel is an alternative for application in marine atmospheres.The increase in Ni content makes Ni-advanced weathering steel have a more unique rust layer than conventional weathering steel.However,unpainted Ni-advanced weathering steel is not suitable for marine environments with high levels of salinity because a protective rust layer does not form in such environments.This paper has systematically introduced the corrosion-resistance mechanism and the corrosion behavior of Ni-advanced weathering steel in marine atmospheres.Considering the lack of corrosion resistance in harsh environments and the required strength and toughness related to the engineering demand,this work provides some suggestions to optimize the composition and organization of Ni-advanced weathering steel to improve its comprehensive properties.
