使用0.1M K2SO4作为电解质对用各种化学品处理的铜试样进行动电位

Polarization of an electrolyte of 0.1M K2SO4 potential for copper samples with various chemical handling dynamic use, the results shown in Figures 3 and 4. The experiment Cu citrate fresh sample processing as a reference. Since the corrosion potential can not be used as parameters to judge the corrosion, the corrosion current is. Thus this experiment mainly corrosion current density (lcorr) make analysis, this value by the software by linear extrapolation CHI600C anodic and cathodic Tafel region branch, obtained from the intersection of the tangent spaces. Icorr respective values ​​shown in Table 1. This experiment considers only linear Tafel curves for area estimation Icorr. Found from the polar diagram in FIG. 3 is a fresh copper Icorr 1.643x10-6A / cm2, while the sample Icorr BTA treated copper is 9.417x10-8A / cm2, a full two orders of magnitude smaller, suggesting that BTA has an effective passivation film formed on the copper surface, so as to provide sufficient chemical protection to the surface of Cu. After using FA / O II chelating agent and arginine cleaning Cu BTA treated sample exhibited high corrosion current density (FIG. 4 (a) below), in particular the concentration of arginine is 200ppm Icorr value up to 9.301x10-6A / cm2, it showed BTA is effectively removed, the surface of the Cu protective passivation film does not exist, but the corrosion rate is accelerated Cu.

A study using 0.1M K2SO4 as an electrolyte for a copper specimen treated with various chemicals into action potential polarization, the results are shown in Figures 3 and 4. The experiment used fresh Cu samples treated with citric acid as a reference. Since the corrosion potential cannot be used as a parameter to judge corrosive energy, corrosion current is. Therefore, the corrosion current density (Icorr) is mainly analyzed in this experiment, which is obtained by CHI600C software from the intersection of tangents by linear extrapolation of anode and cathode branches in the Tafel region. The corresponding Icor value is listed in Table 1. This experiment only considers the linear region of the Tafel curve for Icor estimation. The Icor value of fresh copper is found in figure 3 with an Icor value of 1.643x10-6A /cm2, while the Icor rdate of the copper specimen processed by BTA is 9.417x10-8A /cm2, which is two orders of magnitude, indicating that BTA has formed an effective passivation film on the copper surface, thus providing sufficient chemical protection for the Cu surface. The use of FA/O II chelating and arginine to clean the CU specimen treated with argine showed a high corrosion current density value (as shown in Figure 4(a), especially when the arginine concentration of 200ppm Icorr value of up to 9.301x10-6A / cm2, indicating that the BTA was effectively removed, the Cu surface protective passivation membrane is no longer, but at the same time the corrosion rate of Cu Cu accelerated.

Using 0.1M K2SO4 as electrolyte, the action potential polarization of copper samples treated with various chemicals was studied. The results are shown in Fig. 3 and Fig. 4. In this experiment, citric acid treated fresh Cu sample was used as reference. Because corrosion potential can not be used as a parameter to evaluate corrosion performance, corrosion current is. Therefore, in this experiment, the corrosion current density (icorr) is mainly analyzed. The value is obtained from the intersection of the tangent line by the linear extrapolation of the anode and cathode branches in Tafel region by Chi 600C software. The corresponding icorr values are listed in Table 1. In this experiment, only the linear region of Tafel curve is considered for icorr estimation From the polarization diagram in Figure 3, it is found that the icorr value of fresh copper is 1.643 × 10-6a / cm2, while that of BTA treated copper sample is 9.417 × 10-8a / cm2, which is two orders of magnitude smaller, indicating that BTA has formed an effective passivation film on the copper surface, thus providing sufficient chemical protection for the copper surface. The Cu samples treated with FA / O II chelating agent and arginine showed higher corrosion current density value (as shown in Fig. 4 (a)), especially when the concentration of arginine was 200ppm, the highest icorr value was 9.301x10-6a/cm2, indicating that BTA was effectively removed, the protective passivation film on the Cu surface was no longer existed, but the corrosion rate of Cu was accelerated.<br>