卷曲温度对热轧510L带钢氧化铁皮腐蚀行为的影响

摘要

通过热模拟、暴露试验、扫描电镜和电化学阻抗测试等方法和设备研究了卷曲温度对热轧510L带钢表面氧化铁皮耐腐蚀性能的影响.结果表明,在适当高于600℃的温度卷曲可以改善热轧510L带钢表面氧化铁皮的结构,提高氧化铁皮的致密性,有效阻碍腐蚀性介质的渗透,增强氧化铁皮对基体金属的保护作用,从而提高热轧510L带钢在储运期间的耐大气腐蚀性能.%Effect of coiling temperature on the corrosion resistance of hot rolled 510L strip was investigated by thermal simulation,exposure test,SEM and electrochemical impedance measurements.The results indicated that coiling at a temperature appropriately exceeding 600 ℃ can improve the structure of oxide scale on the hot rolled 510L strip,and enhance the density of oxide scale,which can effectively prevent corrosive substances from penetrating into the substrate and strengthen the protection of oxide scale for base metal,thus improving the corrosion resistance of hot rolled 510L strip during the storage and transportation.