Q195钢表面等离子渗铬及耐蚀性研究  

Research on plasma chromizing on Q195 steel and corrosion resistance of chromized layer

作　　者：李柳霖[1] 高原[1] 黄鹏科[1] 伍启攵科 陈选楠[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2010年第3期242-246,共5页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(50764002);广西区基金重点项目(2010GXNSFD013008);广西信息材料重点实验室主任基金(0710908-06-Z);大学生创新项目(081059517)

摘　　要：The chromized layer formed on the surface of Q195 steel using glow plasma alloying technique to improve the crossion resistance of Q195 steel.The structures,depth,phase composition and surface chromium content of chromized layer at different pressure were analyzed by metalloscope XRD and SEM.The optimize parameters were confirmed.The corrosion resistance of optimize chromized layer in 3.5 % NaCl solution and 1 mol/L NaOH solution are investigated by electrochemical corrosion.The results show that the alloying layers are 30 μm,50 μm and 100 μm in depth and the surface chromium content are 9.25 %、16.63 %、13.82 %(wt %) respectively when the pressures are 25 Pa,35 Pa,45 Pa.The chromized layers are dense and combining closely with the substrate.The depth of the alloying layer increases with the pressure increasing.In a certain rang,the surface chromium content increases with the pressure increasing.Once over a certain value,the surface chromium content decreases with the pressure increasing.Compared with untreated Q195 steel,the corrosion resistance of chromized layer increases 10 times in 3.5 % NaCl solution and 5.13 times in 1 mol/L NaOH solution.The chromized layer formed on the surface of Q195 steel using glow plasma alloying technique to improve the crossion resistance of Q195 steel. The structures, depth, phase composition and surface chromium content of chromized layer at different pressure were analyzed by metalloscope XRD and SEM. The optimize parameters were confirmed. The corrosion resistance of optimize chromized layer in 3. 5 % NaCl solution and 1 mol/L NaOH solution are investigated by electrochemical corrosion. The results show that the alloying layers are 30 μm, 50 μm and 100 μm in depth and the surface chromium content are 9.25 %.16.63 % .13.82 0% （wt%） respectively when the pressures are 25 Pa, 35 Pa, 45 Pa. The chromized layers are dense and combining closely with the substrate. The depth of the alloying layer increases with the pressure increasing. In a certain rang, the surface chromium content increases with the pressure increasing. Once over a certain value, the surface chromium content decreases with the pressure increasing. Compared with untreated Q195 steel, the corrosion resistance of chromized layer increases 10 times in 3.5 % NaCl solution and 5.13 times in 1mol/L NaOH solution.

关 键 词：等离子渗铬 耐蚀性 渗铬层 

分 类 号：TG178[金属学及工艺—金属表面处理]