磁场和NaCl液膜耦合作用下铜腐蚀产物的演化

Evolution of Copper Corrosion Products in a Coupling Environment of Magnetic Field and NaCl Electrolyte Layer

在外加磁场条件下对铜进行了静态NaCl液膜下腐蚀试验,通过扫描电镜(SEM)和X射线衍射(XRD)等技术研究了水平磁场对液膜下铜腐蚀产物演化的影响。结果表明:铜在NaCl液膜和磁场耦合环境中的腐蚀产物由疏松的Cu_(2)(OH)_(3)Cl外层和致密的Cu2O内层组成;磁场没有改变铜在NaCl液膜下的腐蚀机理,但加速了腐蚀的进程,改变了腐蚀产物的形貌,经过30 d腐蚀后,腐蚀产物层表面形成了球状Cu_(2)(OH)_(3)Cl晶粒。

Corrosion tests on copper under static NaCl electrolyte layer were carried out in applied magnetic field.The effect of horizontal magnetic field on corrosion product evolution of copper under electrolyte layer was investigated through scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results showed that the corrosion products of copper consisted of loose outer layer with Cu_2(OH)_3Cl and dense inner layer with Cu_2O in the environment of NaCl electrolyte layer coupling with magnetic field.The magnetic field did not change the corrosion mechanism of copper under electrolyte layer,but accelerated the corrosion process and changed the morphology of corrosion products.After 30 days of corrosion,spherical Cu_2(OH)_3Cl grains formed on the surface of the corrosion product layer.