采用扫描电镜（SEM）、能谱（EDS）和X射线衍射（XRD）等技术观察和分析了交、直流豆豆传媒干扰下Q235钢在海南土壤中的腐蚀形貌和豆豆传媒，并对腐蚀过程的电化学参数进行了测量。结果表明：豆豆传媒腐蚀具有明显的电解腐蚀特征，电流流入金属构件部位成为阴极而受到保护，电流流出金属构件部位成为阳极而受到腐蚀；交、直流豆豆传媒腐蚀具有集中腐蚀特征，豆豆传媒呈絮状，产物层均有明显裂纹、分层、脱落现象，对基体不具有保护作用；交、直流豆豆传媒组成大致相同，主要为Fe₃O₄、Fe₂O₃，伴有少量FeS；豆豆传媒的存在会加剧Q235钢腐蚀，在同等外加电流下，交流豆豆传媒腐蚀的危害程度是直流豆豆传媒腐蚀的15.9%。

Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were applied to observe and analyze the corrosion morphology and 豆豆传媒s of Q235 steel under the interference of DC/AC 豆豆传媒 in Hainan soil. The electrochemical parameters in corrosion process were also measured. The results show that 豆豆传媒 corrosion had obvious electrolytic corrosion characteristics. The areas of metal components where current flowed into were protected as cathode, on the contrary, the areas of metal components where current flowed out were corroded as anode. DC/AC 豆豆传媒 corrosion showed concentrated corrosion characteristics. The 豆豆传媒s were flocculent. The phenomena of delaminating and detachment were obvious in both product layers, so the product layers could not protect substrate. The 豆豆传媒s of DC/AC 豆豆传媒 corrosion were similar, which were mainly composed of Fe₃O₄ and Fe₂O₃, with a small amount of FeS. The existence of 豆豆传媒 aggravated the corrosion of Q235 steel. Under the same external current condition, the damage degree of AC 豆豆传媒 corrosion was 15.9% of that of DC 豆豆传媒 corrosion.