不同温度下泡沫灭火剂对消防设备金属的腐蚀研究
Study on the corrosion of metal of fire-fighting equipment by foam extinguishing agent at different temperatures
蒋凯 1孔得朋 1王东升1
作者信息
- 1. 中国石油大学 机电工程学院,山东 青岛 266580
- 折叠
摘要
为探究不同温度下泡沫灭火剂对消防设备金属的腐蚀行为,选用了水成膜泡沫灭火剂(AFFF)、合成型泡沫灭火剂(S)、氟蛋白泡沫灭火剂(FP)这 3种消防工作中常用的泡沫灭火剂和2种消防设备金属材料(镀锌钢、铝合金),在40～80℃下开展了浸泡失重和电化学测试试验,并计算了腐蚀速率,测量了腐蚀电流密度等关键参数.结果表明:金属腐蚀速率随温度升高而增大,3种泡沫灭火剂对2种金属的腐蚀速率依次为:FP>S>AFFF,2种金属的耐蚀性为:铝合金＞镀锌钢.随着温度的升高,2种金属的腐蚀程度有所加剧,镀锌钢表面产生腐蚀产物与点蚀坑,铝合金表面颜色变暗,在FP中,两种金属表面均产生点蚀坑,其数量和深度随温度升高而增加.电化学测试发现,在腐蚀初期,随着温度升高,腐蚀电流密度上升,电容弧径和电荷转移电阻减小,腐蚀加快.此外,在不同温度下,铝合金在 3种泡沫液中以及镀锌钢在AFFF和FP中的腐蚀机制都处于电荷转移控制之下,但镀锌钢在S中表现为典型的扩散控制.
Abstract
In order to explore the corrosion behavior of foam extin-guishing agent on the metal of fire-fighting equipment at different temperatures,water film foam extinguishing agent(AFFF),syn-thetic foam extinguishing agent(S)and fluoroprotein foam extin-guishing agent(FP),which are commonly used in fire-fighting,and two kinds of metal materials of fire-fighting equipment(galva-nized steel,aluminum alloy)were selected.The immersion weight loss and electrochemical test experiments were carried out at 40～80 °C,and the corrosion rate was calculated.The key pa-rameters such as corrosion current density were measured.The re-sults show that the corrosion rate of the metal increases with the increase of temperature.The corrosion rates of the three foam ex-tinguishing agents on the two metals are:FP>S>AFFF,and the corrosion resistance of the two metals is:aluminum alloy>gal-vanized steel.With the increase of temperature,the corrosion de-gree of the two metals increased.Corrosion products and pitting pits appeared on the surface of galvanized steel,and the surface color of aluminum alloy became darker.In FP,pitting pits ap-peared on the surface of both metals,and their number and depth increased with the increase of temperature.Based on electrochemi-cal tests,it was found that at the initial stage of corrosion,with the increase of temperature,the corrosion current density in-creased,the capacitance arc diameter and charge transfer resis-tance decreased,and the corrosion accelerated.In addition,at dif-ferent temperatures,the corrosion mechanism of aluminum alloy in three foam solutions and galvanized steel in AFFF and FP is under charge transfer control,but galvanized steel in S shows typical diffusion control.
关键词
泡沫灭火剂/消防设备/腐蚀研究/电化学Key words
foam extinguishing agent/fire-fighting equipment/corrosion research/electrochemistry引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据