Enhanced life test method for titanium electrode test method

When studying the new coating formulation, because the actual operation life of titanium anodes is very long, often in a few months, or even more than a few years, it is impossible to wait until the anodic operation passivation, before obtaining a working life data. Scholars all over the world are using the internationally universal enhanced life test, also known as the fast life test, that is, in the high current density, harsh electrolytic medium to strengthen the operation, the passivation time is called enhanced (fast) operation life, it can qualitatively judge the development of coated titanium anode actual working life.

IrTa oxide coating is recognized as the best oxygen evolution coating, which can achieve the best electrocatalytic activity and electrochemical stability. In the study of IrTa coating, no. 92 test sheet was electrolyzed continuously at 1mol/L H2SO4 and 40 degrees 4A/cm2 for 2928.5h(i.e. 122 days), and the accumulative current reached 11.7x104A/h/cm2.

However, the accumulated power is related to the amount of iridium metal (Ir) used in the coating, that is, the large amount of Ir coating, long strengthening life, and the accumulated power. Therefore, the authors propose a new concept to measure electrode performance and economy comprehensively using standard reinforcement life. Strengthening life (quick life) test, the cumulative power of unit area is converted to 1g(Ir)/m2 coated amount of life, that is, the standard strengthening life, the unit is 104A·h/g(Ir). In our study of low Ir coating (less than 10g/m2), the standard enhanced life of no.23 sample was 327.87* 104a. h/g Ir loss was 0.3μg/(A·h).