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采用4种不同配方拉丝油经定径抛光拉制而成的Φ1.17 mm H08Mn2Si A焊丝拆封后,在封闭干燥环境储存5个月,并对这4种单根焊丝段在湿润恶劣条件下储存90天,分别比较的焊丝表面的锈点密度和大小,评价不同油膜包覆的焊丝的防锈性能。测量不同油膜包覆的焊丝在微极化区的线性极化曲线和电化学阻抗谱,对比焊丝的防锈性能与电化学响应之间的关系,探索采用电化学法快速评价无镀铜油膜包覆焊丝的防锈性能方法。结果表明:当油膜包覆焊丝的防锈性能差别较大时,通过极化阻力可以快速评价焊丝的防锈能力,极化阻力越大,防锈能力越好。油膜包覆的焊丝防锈性能越好,在阻抗谱Bode模图低频区阻抗模值越大。因此,可用阻抗谱Bode图在低频区的阻抗谱模值评价油膜包覆焊丝的防锈性能。
Φ1.17 mm H08Mn2Si A wire drawn by diameter polishing with 4 different formulations of wire drawing oil was unpacked and stored in a closed and dry environment for 5 months. The 4 single wire segments were tested under wet and harsh conditions Storage 90 days, respectively, compared to the surface of the wire rust density and size, evaluation of different oil film coated wire rust performance. The linear polarization curves and electrochemical impedance spectra of different oil-coated wires in the micropolarization zone were measured and the relationship between the corrosion resistance of the welding wire and the electrochemical response was measured. Electrochemical method Anticorrosive properties of coated wire. The results show that the anti-rust ability of the wire can be quickly evaluated through the polarization resistance when the anti-rust properties of the oil-coated wire are quite different. The larger the polarization resistance, the better the anti-rust ability. The better antirust property of the oil-coated wire is, the larger the impedance modulus is in the low-frequency region of Bode mode. Therefore, the impedance spectrum of the Bode map can be used to evaluate the anti-rust performance of the oil-coated wire.