Microcosmic shape of corrosion scales were analyzed by Scanning electron microscope corrosion scale stratified clearly which consisted of surface biofilms stratum compactum and tectorium .

应用扫描电镜对 生长 环的微观形态进行测试， 生长 环分层清晰，分别为表面粘垢、 易 脱落 的 疏松层和 致密层。