目的 通过三乙烯四胺和苯甲酸合成IMBT，再利用IMBT、 H3PO3和甲醛经过曼尼希反应制得IMBTM，并探究其对碳钢在HCl水溶液中的缓蚀作用。方法 采用动态失重法、电化学技术以及热力学等方法研究缓蚀剂IMBT和IMBTM在60 ℃、1 mol/L的盐酸溶液中对10#碳钢的缓蚀性能和吸附规律。结果 利用IR对产物进行表征，均得到了产物特征峰。在动态失重试验中，IMBT和IMBTM两种缓蚀剂的质量浓度为3 g/L时，碳钢的腐蚀速率分别为3.92、2.94 g/(m2?h)，缓蚀剂的缓蚀率分别为79.65 %和84.75 %。极化曲线试验表明随着两种缓蚀剂浓度增加，腐蚀电位正移，阳极电流密度下降明显。交流阻抗的测试显示随着两种缓蚀剂浓度增大，容抗弧半径逐渐增大，且在相同浓度下，添加IMBTM时的容抗弧半径更大。另外，随着缓蚀剂浓度的增加，拟合参数Rct增大、Cdl减小，证明缓蚀剂在金属表面取代了水，并吸附成膜。研究等温吸附模型，发现数据带入Langmuir等温吸附方程后，表现出了很好的线性关系。结论 在1 mol/L HCl溶液中，IMBT和IMBTM对10#碳钢均有缓蚀作用，且IMBTM的缓蚀作用较高。两种缓蚀剂均属于阳极型缓蚀剂，对阳极的缓蚀作用较高。且两种化合物在10#碳钢表面上的吸附过程为自发放热过程, 其吸附规律遵循Langmuir等温吸附式，属于单分子层吸附。

The work aims to synthetize IMBT by triethylenetetramine and benzoic acid and then to prepare IMBTM by IMBT, H3PO3 and formaldehyde through Mannich reaction. The corrosion inhibition of carbon steel in HCl solution was investigated. Dynamic weight loss method, electrochemical technique and thermodynamic method were used to study corrosion property and adsorption rule of 10# carbon steel by corrosion inhibitors IMBT and IMBTM in 1 mol/L HCl at 60 ℃. The products were characterized by IR. In the spectrum, the product characteristic peaks appeared. In the dynamic weightlessness test, when the concentration of two kinds of corrosion inhibitors were 3 g/L, the corrosion rate of steel was respectively 3.92 g/(m2?h) and 2.94 g/(m2?h) and the corrosion inhibition rate of corrosion inhibitors was 79.65 % and 84.75 % respectively. From polarization curve test, the corrosion potential of two corrosion inhibitors was moving forward as concentration increased and the anode current density decreased obviously. From test of AC impedance, with the increase of concentration, the radius of the resistance of two kinds of corrosion inhibitors increased gradually. At the same concentration, IMBTM had a larger arc radius. With the increase of concentration the increase of Rct and the decrease of Cdl showed that the corrosion inhibitor replaced water and adsorbed into the film. Good linear relationship was found by studying an isothermal adsorption model and bringing data into Langmuir isothermal adsorption equation. IMBT and IMBTM have corrosion inhibition effects on 10# carbon steel in 1 mol/L HCl medium and the IMBTM has stronger inhibition effect. Both corrosion inhibitors are anode corrosion inhibitors and havehigh corrosion resistance to the anode. The adsorption of these two compounds on the surface of 10# carbon steel isspontaneous exothermic process and the adsorption rules are in accordance with the Langmuir isothermal adsorption which belongs tosingle molecular layer adsorption.