溶液在腐蚀不锈钢材料过程中等效折射率的变化进行分析，得到 2 mL 0.5wt% 的 NaCl 溶液，检测到条纹移动的最快速率为-9.32 $10-² nm / s，产生的光谱峰值变化为 -3.93 $10-² dB / s，腐蚀速率呈现先增加后减小的趋势.由于采用电化学方法加速腐蚀过程，可在一分钟内对腐蚀过程进行监测，并可推广至其他金属材料.本实验可以作为金属线胀系数实验的延伸实验或创新设计实验.

MZ interferometer is used to monitor the processing of the dynamic corrosion process. The

corrosion rate of metal bars can be evaluated with ultra-sensitivity even when the

concentration of NaCl solution is only 0.05 wt%. It is found that the sensitivity response is a

function of the effective refractive index ( RI) . The experimental results reveal that the

speeds of the wavelength shift is up to -9.32×10-² nm / s，and the increase of the peak intensity

is about -3.93×10-² dB / s. Mo- reover，the electrochemical technology is used to accelerate the

corrosion process. And the whole process could be monitored within 1 min. This experiment can

be used as the extension experiment or innovative experiment of the

metal linear expansion coefficient experiment.