發(fā)布時間：2018-01-19 10:28

  本文關(guān)鍵詞： 緩蝕劑 曼尼希堿 吸附 EIS SEM 緩蝕效率　出處：《表面技術(shù)》2017年01期 　論文類型：期刊論文

【摘要】：目的制備一種新型曼尼希堿緩蝕劑并研究其性能。方法利用失重法研究緩蝕劑緩蝕效率與緩蝕劑的質(zhì)量濃度、鹽酸質(zhì)量分數(shù)、腐蝕溫度、腐蝕時間的關(guān)系,確定緩蝕劑的吸附曲線。通過動電位極化曲線法和交流阻抗法研究緩蝕劑的綜合性質(zhì)。利用掃描電鏡觀察腐蝕前后N80鋼片的表面形態(tài)。結(jié)果緩蝕劑緩蝕效率隨緩蝕劑添加量的增大而增大,隨測試溫度的升高而下降,隨鹽酸質(zhì)量分數(shù)的升高先增大后減小,隨腐蝕時間的延長先增大后減小。60℃時,在質(zhì)量分數(shù)為15%鹽酸中浸入4 h、緩蝕劑添加量在1.0 g/L的條件下,緩蝕劑緩蝕效率為99.18%,腐蝕反應(yīng)的活化能由56.34 k J/mol提高到了86.54 k J/mol。緩蝕劑在N80鋼表面符合Langmiur吸附模型,吸附吉布斯自由能為-29.94 k J/mol。極化實驗結(jié)果顯示該緩蝕劑為以陰極抑制為主的混合型緩蝕劑。阻抗譜圖顯示添加緩蝕劑后,阻抗明顯增大。掃描電鏡結(jié)果顯示緩蝕劑有效抑制了鹽酸對N80鋼片的腐蝕。結(jié)論所制備的緩蝕劑在質(zhì)量分數(shù)為15%的鹽酸中對N80鋼片有良好的緩蝕效果。
[Abstract]:Objective to prepare a new type of Mannich base corrosion inhibitor and study its performance. Methods the relationship between corrosion inhibition efficiency and mass concentration of hydrochloric acid, mass fraction of hydrochloric acid, corrosion temperature and corrosion time was studied by weight loss method. The adsorption curve of corrosion inhibitor was determined. The comprehensive properties of corrosion inhibitor were studied by potentiodynamic polarization curve and AC impedance method. The surface morphology of N80 steel sheet before and after corrosion was observed by scanning electron microscope. Results corrosion inhibition efficiency of corrosion inhibitor was obtained. With the increase of the amount of corrosion inhibitor. With the increase of the test temperature, the content of hydrochloric acid increases first and then decreases. With the prolongation of corrosion time, it increases first and then decreases at .60 鈩，

本文編號：1443764