Investigation of Iron Corrosion Process Beneath Coating in DiFFerent Kinds of Anion Solution Using the Technique of Array Electrode

应用阵列电极测量不同阴离子介质中有机涂层/铁电极界面电位分布图，研究腐蚀发生、发展过程.实验结果表明：腐蚀优先发生在有机涂层/铁电极界面边缘.涂层一旦破裂，在Cl-介质中腐蚀很快发生并不断发展，在nO-3介质中腐蚀也很快发生，一段时间后就逐渐受抑制，而在CO2-3介质中腐蚀不发生.与常规电极相比，阵列电极能给出更详细的腐蚀界面的电化学参数.The array electrode as a new electrochemical technique is applied to map the corrosion potential imaging and to sutdy the corrosion process at the interFace of organic coating/iron aFter being immmersed in solutions containing diFFerent kinds of anion.The experiment results indicated that the corrosion preFerentially occured on the edge of the surFace of organic coating/iron and ,when the coating was broken down ,the crrosion occured and developeed in Cl - solution, however corrosion occured First and then was suppressed in NO - 3 solution and the corrosion was prevented in CO 2- 3 solution.In comparison with the traditional methodpolarization curve, more detailed crrosion inFormation of coating/iron interFace can be obtained From the array electrode technique.国家自然科学基

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^