摘要
将传统的粉末包埋渗和表面纳米化工艺相结合，得到一种中低温快速制备金属涂层的方法，在低温（400～600℃）、短时间（30～120min）下成功制备了一系列金属铝化物涂层。将此方法用于金属表面的渗钛处理，利用两种不同的活化剂NH4F和AlCl3·6H2O＋Fe2O3，借助介质球的冲击效应，在650℃振动处理180min就可在碳钢表面制备10～15μm厚的渗钛层。SEM和XRD研究结果表明，渗钛层的结构与选用的活化剂种类有关。在HCl质量分数为5％的溶液中进行的极化曲线测试结果显示，用NH4F、AlCl3·6H2O＋Fe2O3作活化剂，所制备的渗钛层腐蚀速度分别为0．32mA／cm^2、0．07mA／cm^2，相对于碳钢空白样（其腐蚀速度为4．4mA／cm^2），其耐蚀性分别提高了13．75、62．85倍。
A new method of preparing metal coatings at low temperature put forward, which combines diffusive coatings routine and surface nanometre treatment. Some kinds of Al-coatings were successfully prepared at lower temperature （400 - 600 ℃ ） for short duration （30 - 120 min） by this method. A diffusive Ti-coatings were prepared via this method at 650℃ for 180min under ball impacting, and the thickness of Ti-coatings achieved 10 - 15 μm by use of activators of NH4F and AlCl3 · 6H2O ＋ Fe2O3 respectively. The microstructures of Ti-coatings can be influenced activators. Ti-coatings, mainly containing TiN phase on surface, are homogeneous and dense with NH4F activator, with a transition layer between coatings and substrate; however, Ti-coatings, mainly containing phases of Ti-Fe-O and a little of Al2O3 on surface, are single-layer structures and very homogeneous and dense with AlCl3 · 6HeO ＋ Fe2O3. Both types of Ti-coatings, prepared by use of NH4F and AlCl3 · 6H2O ＋ Fe2O3 have strong ability to resist HCl corrosion. Compared to blank carbon steel substrates whose corrosion rate is 4.4mA/cm^2 on average, corrosion rates of both samples with Ti-coatings on surface are 0.32 mA/cm^2 and 0.07 mA/cm^2 respectively, corrosion resistance increase by 13.75 and 62.85 respectively.
出处
《装备环境工程》
CAS
2007年第3期66-69,共4页
Equipment Environmental Engineering
基金
国家自然科学基金项目(50401017)
关键词
渗钛
钛化物涂层
耐腐蚀性
机械能
diffusive Ti-coatings
corrosion resistance
corrosion resistance
mechanical energy
mechanical energy
作者简介
陈为为（1982-），男，湖北荆州人，博士研究生，主要研究方向为材料表面化学改性和机理研究。
