月桂酸微波反应制备焊条抗吸潮膜研究

摘要

Water-resistant film of electrode is prepared by microwave reaction.Microwave absorption material Fe3O4 is used to reduce the diffusible hydrogen of weld bead,and promote the reaction of lauric acid and electrode surface.Electrode is immersed to the light petroleum solution of lauric acid and Fe3O4,then the electrode is put into the microwave oven and become water-resistant.The results of FT-IR and SEM microscope show that Fe3O4 absorb microwave and lead to the reaction of lauric acid and electrode surface.The diffusible hydrogen of the deposited metal of microwave treated electrode decreased to 87% of the untreated electrode, and it does not vary with the staving time within 8 h.%利用月桂酸微波反应的方法在焊条药皮表面制备了抗吸潮保护膜.将烘于的焊条放入溶有一定量月桂酸和Fe3O4粉末的石油醚溶液中,取出烘干后进行微波反应,使焊务表面具有抗吸潮性能.用FT-IR、SEM、EDS对所得焊条保护膜的成分和形貌进行了分析,并进行了熔敷金属扩散氢测试.研究结果表明,Fe3O4在吸收微波后能融化月桂酸并使其与焊条表层反应,形成与焊条表面结合牢固的保护膜,有效阻止水分进入焊条内部.这使焊条保存0～8h其扩散氢含量基本无变化,为未经表面处理焊条扩散氢含量的87％.Fe3O4粉末在焊接过程中进入电弧空间强化气氛的氧化性,有效提高了电弧气氛的去氢能力.