In order to improve the film formation speed and corrosion resistance of C e M n conversion film on the surface of aluminum alloy at room temperature, three scholars Zhang Junjun, Li Wenfang and Du Jun from the School of Materials Science and Engineering of South CHINA University of Technology elaborated their scientific research results in this article . And published in the Journal of South CHINA University of Technology (Natural Science Edition).
Its point of view is that adding additives to the treatment solution at room temperature will have a great impact on the film thickness and corrosion resistance of the film. Na F , HF and Na BF can increase the film thickness and corrosion resistance of the conversion coating; HBO, Z r (SO) and Na Z r F can reduce the film thickness and corrosion resistance of the conversion coating.
In the film thickness measurement of the conversion film, a Surfix FNB eddy current Thickness Gauge from PHYNIX Company in Germany was used to measure the film thickness. During the experiment, several points were taken on the front and back of the sample to measure the film thickness, and then the average value was taken as the film thickness. For details, please refer to the original text.
