采用红外光谱、扫描电镜与原子力显微镜表征了304不锈钢载波氧化膜/聚噻吩复合膜,通过电化学测试技术考察了复合膜的耐蚀性能.结果表明:通过载波钝化后在304不锈钢氧化膜上电沉积聚噻吩(PTH)膜,制备了304SS/氧化膜/PTH的复合膜,膜层致密.复合膜中的PTH层的分子结构按α-α’规则连接,并具有良好的电化学氧化还原可逆性.复合膜的电导率在5～10S/cm的范围内.304SS/PTH和304SS/AV800/PTH,304SS/AV1020/PTH复合膜的界面结合强度分别为0.81,4.98MPa和5.10MPa.在1MH2SO4溶液中耐蚀性能测试结果,两种复合膜的腐蚀电位正移0.80V,使304不锈钢基体保持在钝化状态,抑制了304不锈钢基体的阳极活性溶解,提高了耐蚀性能.比较而言,由于304SS/AV1020表面多孔性与PTH膜形成多孔氧化物的嵌合层,使得304SS/AV1020 /PTH复合膜的电化学、电学及界面结合强度均优于304SS/AV800/PTH复合膜.
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