近年来，微生物腐蚀受到广泛重视．本文根据生物膜的结构特征，以含羧酸官能团的β＿Ｄ甘露糖醛酸单元等构成的天然高分子多糖凝胶沉积于电极表面，形成模拟生物膜，初步建立起模拟生物膜环境的实验方法，并探讨了模拟海水ＮａＣｌ溶液中生物膜对１０ＣｒＭｏＡｌ、Ｅ２低合金钢和１８＿８不锈钢腐蚀行为的影响．采用极化曲线法、电偶电流测试及交流阴抗谱等电化学方法研究了上述材料在模拟生物膜环境中的腐蚀电化学行为，得到了一些有益的结果． In recent years, microbial corrosion has received widespread attention. In this paper, based on the structural characteristics of biofilms, natural polysaccharide polysaccharides composed of β_D mannuronic acid units containing carboxylic acid functional groups were deposited on the surface of the electrode to form simulated biofilms. The experimental methods for simulating the biofilm environment were initially established. The effects of biofilm in simulated seawater NaCl solution on the corrosion behavior of 10CrMoAl, E2 low alloy steel and 18_8 stainless steel were also discussed. The electrochemical behavior of the above materials in simulated biofilm environment was studied by means of polarization curve method, galvanic current test and AC anodic impedance spectroscopy. Some useful results were obtained.