摘要
将壳聚糖(CS)改性成月桂酰壳聚糖(LYCS),再以戊二醛作为交联剂,制备海藻酸钠-月桂酰壳聚糖(SALYCS)。通过失重试验和电化学试验研究了海藻酸钠-月桂酰壳聚糖在1mol/L盐酸溶液中对Q235碳钢的缓蚀作用。结果表明:在同一温度下,海藻酸钠-月桂酰壳聚糖的缓蚀率随其含量的增大而增大;同一浓度下,随温度升高,缓蚀率先增大后减小,在308K时达到最佳;海藻酸钠-月桂酰壳聚糖在碳钢表面上的吸附符合Langmuir吸附模型;海藻酸钠-月桂酰壳聚糖属于抑制阴极反应为主的混合型缓蚀剂。
Lauroyl chitosan(LYCS)was prepared by modification of chitosan(CS),and then sodium alginatelauroyl chitosan(SA-LYCS)was prepared using glutaraldehyde as a cross-linking agent.The corrosion inhibition of the SA-LYCS to carbon steel in 1 mol/L HCl solution was investigated by weight loss method and electrochemical testing.The results show that inhibition efficiency increased with the increase of SA-LYCS concentration at the same temperature.At the same concentration,inhibition efficiency increased at first and then decreased with the increase of temperature.The largest value of inhibition efficiency was gotten when the temperature was 308 K.The adsorption behavior of the SA-LYCS on the steel surface was fitted to Langmuir adsorption model.The SA-LYCS was a mix inhibitor mainly inhibiting cathodic raction.
引文
[1] FONTANA M G.Corrosion Engineering[M].Singapore:McGraw-Hill,1986:26-30.
[2]李言涛,侯保荣.天然环保型缓蚀剂近期研究进展[J].腐蚀科学与防护技术,2006,18(1):37-40.
[3] BENBOUYA K,FORSAL I,ELBAKRI M.Influence of pyridazine derivative on corrosion inhibition of mild steel in acidic media[J].Reseaarch on Chemibal Intermediates,2014,40(3):1267-1281.
[4] QURAISHI M A,SARDAR R,JAMA D.Nat urally occurring products as corrosion inhibitors[J].Bull Electrochem,2004,20:171-178.
[5]张宝宏,丛文博.金属电化学腐蚀与保护[M].北京:化学工业出版社,2005:6-16.
[6] SHEN Z H,REN H Q,XU K,et al.Inhibition effect of phosphorus-based chemicals on corrosion of carbon steel in secondary-treated municipal wastewater[J].Water Science and Technology,2013,64(11):2412-2417.
[7]郑逸云,周柏青,李芹.水处理缓蚀剂应用现状与发展[J].腐蚀科学与防护技术,2004,16(2):101-104.
[8]蒋伟,龚敏,赵金平.天然植物绿色缓蚀剂的研究进展[J].腐蚀科学与防护技术,2007,19(4):278-281.
[9] SAXENA N,KUMAR S,SHARMA M K,et al.Corrosion inhibition of mild steel in nitric acid media by some Schiff bases derived from anisalidine[J].Polish Journal of Chemical Technology,2013,15(1):61-67.
[10] POPOOLA A P I,ABDULWAHAB M,FAYOMI O S I.Corrosion inhibition of mild steel in sesamum indicum-2M HCl/H2SO4interface[J].International Journal of Electrochemical Science,2012,7(7):5805-5816.
[11]饶楚仪,张大全,金星,等.模拟汽车冷却液中海藻酸钠对AZ31镁合金的缓蚀作用[J].腐蚀与防护,2011,32(12):936-938.
[12]李言涛,吴茂涛,刘建国,等.海水介质中壳聚糖对碳钢的缓蚀性能[J].材料保护,2008,41(12):21-25.
[13]骆鸿,王宇宁,董超芳,等.水溶性壳聚糖对双相不锈钢的缓蚀作用[J].腐蚀与防护,2017,38(1):25-28.
[14]张艳飞,杨成.琥珀酰基月桂酰壳聚糖的制备及性能[J].精细化工,2013,30(1):75-79.
[15] MINHA A.The effect aqueous extracts of some leaves&fruit-peels on the corrosion of steel in acid[J].Corrosion Prevention&Control,1999,35(4):32-37.
[16]庞雪辉,张玉璇,厉建苗.1mol/L HCl中不同浓度维生素B1和B6对碳钢的缓蚀性能及机理[J].材料保护,2011,44(3):27-31.
[17]沈建,余鼎声,庞正智.苯并咪唑类化合物作为碳钢缓蚀剂的研究[J].北京化工大学学报,2005,32(4):110-117.
[18] KHARAFI F M,GHAYAD I M,ABDALLAH R M.Corrosion inhibition of copper in seawater by 4-amino-4h-1,2,4-triazole-3-thiol[J].Corrosion,2013,69(5):522-523.
[19]闫莹,李伟华,邢少华,等.新型杂环化合物在1mol/L HCl中对Q235钢的缓蚀性能研究[J].腐蚀科学与防护技术,2007,19(6):313-315.
[20] AMIN M A,SHOKRY H,MABROUK E M.Nickel corrosion inhibition in sulfuric acid-electrochemical studies,morphologies,and theoretical approach[J].Corrosion,2012,68(8):699-712.
[21] YAN M C,VETTER C A,GELLING V J.Corrosion inhibition performance of polypyrrole Al flake composite coatings for Al alloys[J].Corrosion Science,2013,70:37-45.
[22] LI X H,DENG S D,XIE X G.Experimental and theoretical study on corrosion inhibition of oxime compounds for aluminium in HCl solution[J].Corrosion Science,2014,81:162-175.
