Electrochemical corrosion behavior of steel wires in a coalmine with a corrosive medium

6 脳升起电报的 19 点接触被用作我们的研究目标在一个实验室检验钢电线的腐蚀的进步，在 coalmine 模仿实际工作条件。一个电气化学的方法被用来与腐蚀剂酸溶液的不同表面处理调查钢电线的腐蚀行为。在当，赤裸的钢电线的阳极激活过程最快的地方，结果证明钢电线的阳极激活主要发生在腐蚀前期间是他们的相应腐蚀速度，当涂的钢电线和他们的相应腐蚀加速的油的阳极激活过程最低时。在中间、迟了的沉浸时期期间，一部被动电影在钢电线的表面上被产生，它逐渐地与时间的推移被损坏。本地 pitting 腐蚀与一个高极化的潜力在钢电线的表面上容易发生。合适的相等的电路被选择在各种各样的腐蚀剂时间和不同表面处理适合钢电线的电气化学的阻抗光谱学(EIS ) ，它显示好恰当的结果。双电的层费用转移抵抗在顺序增加：赤裸的钢电线，未经治疗的钢电线和油涂的钢电线和他们的腐蚀抵抗接着减少，它与他们的极化曲线一致。油层在未经治疗的钢电线上提供某个保护的效果，但是它的效果不是完全清楚的。

A6×19 point-contact hoisting cable was used as our research object to examine the progress of corrosion of steel wires in a laboratory,simulating the actual working conditions in a coalmine.An electrochemical method was used to investigate the corrosion behavior of steel wires with different surface treatments of a corrosive acid solution.The results show that anode activation of steel wire mainly occurs during pre-corrosion,where the anode activation process of bare steel wires is the fastest as is their corresponding corrosion speed,while the anode activation process of oil coated steel wires and their corresponding corrosion speed are the lowest.During the intermediate and late immersion periods, a passive film is generated on the surface of steel wires,which are gradually damaged with the passage of time.Local pitting corrosion occurs easily on the surface of steel wires with a high-polarization potential. Suitable equivalent circuits were chosen to fit the electrochemical impedance spectroscopy（EIS）of steel wires over various corrosive times and different surface treatments,which indicate good fitting results. The double electrical layer charge-transfer resistance increases in the sequence：bare steel wire, untreated steel wire and oil coated steel wire and their corrosion resistance decreases in turn,which is consistent with their polarization curves.The oil layer provides a certain protective effect on untreated steel wires,but its effect is not entirely clear.