摘要
采用失重法研究了迎春花(Jasminum nudiflorum Lindl.)叶提取物(JNLLE)在H3PO4介质中对冷轧钢缓蚀作用,考察了缓蚀剂浓度(20～200mg/L)、温度(20～50℃)、腐蚀浸泡时间(6～48 h)、酸浓度(1.0～10.0 mol/L)对缓蚀性能的影响。结果表明:JNLLE在1.0 mol/LH3PO4溶液中对冷轧钢的缓蚀率随缓蚀剂浓度和温度的增加而增大,且在钢表面的吸附符合Temkin吸附等温式。缓蚀率随腐蚀浸泡时间的延长先增大,后减小,在24 h出现极大值;缓蚀率随H3PO4浓度的增加而下降,到6.0 mol/L后则基本不变。
The inhibition effect of Jasminum nudiflorum Lindl. leaves extractive （JNLLE） on the corrosion of cold roiled steel （CRS） in H3PO4 media was studied by weight loss method. Effects of inhibitor concentration （20～200mg/L）, temperature （20～50℃）, immersion time （6～48h） and acid concentration （1.0～10.0 mol/L） on inhibition performance were discussed in detail. The results show that the inhibition efficiency of JNLLE for CRS in 1.0 mol/L H3PO4 increases with the inhibitor concentration and temperature. The adsorption of JNLLE on the CRS surface obeys Temkin adsorption isotherm. Inhibition efficiency increases the inhibitor concentration, then decreases, and reaches maximum value for 24h. Inhibition efficiency decreases with acid concentration, and then does not change remarkable when the acid concentration is higher than 6.0 mol/L.
出处
《全面腐蚀控制》
2011年第11期42-45,共4页
Total Corrosion Control
基金
云南省应用基础研究面上项目(2010ZC094)
关键词
迎春花
提取物
磷酸
钢
缓蚀
吸附
Jasminum nudiflorum Lindl
extract
phosphoric acid
steel
inhibition
adsorption
