The ceramic coating was obtained by the method of micro-arc oxidation of the hot-dipped aluminum coating on Q235 for the first time. The hot-dipping condition fitting for the micro-arc oxidation was found. The discipline that the technologic parameters influence on the overall thickness and the thickness grown outward and the discipline of the size changing of the sample before and after micro-arc oxidation were studied in this paper. The ceramic coating was analysed by X-ray, SEM arid TEM. The...