Abstract
The effectiveness of anti-corrosive mechanism mostly depends on the condition of painted films. In the other words, the perfect film of the paint is most necessary for corrosion protection. At present, the inspectors usually use the paint film tester (mesurement of electromotive force by DC current) or the magnetic thickness gauge to check the painted films.
The authors have studied two items concerning above problems as follows.
(1) by using the impedance meter (automatic-calculated), we has been check the imperfect condition of painted film as reported already
(2) we could determined the control limit of checking for film performance.
