咪唑啉油酰胺的合成及在油气井产出液中的缓蚀性能  

Synthesis and Corrosion Inhibiting Property in Oilfield Produced Water of Oleoamido Imidazoline YIM

作　　者：黄金营[1] 魏慧芳[2] 张利嫱[2] 郑家燊[1] 

机构地区：[1]华中科技大学化学系,湖北武汉430074 [2]中国石化中原油田分公司采油二厂,河南范县457532

出　　处：《油田化学》2004年第3期230-233,236,共5页Oilfield Chemistry

摘　　要：由油酸和二乙烯三胺合成了咪唑啉酰胺YIM并用红外光谱表征了化学结构。失重法测试结果表明,温度60℃、加剂量50mg/L时,在矿化度1.24×105mg/L的中原文东油田采出水中,YIM对Q235、N80、J55钢试片的缓蚀率分别为81.7%、75.6%和74.6%;缓蚀率随CO2分压增大(0.2～1.0MPa)而降低,降低幅度以Q235钢为最大,J55钢次之,N80钢最小。根据极化曲线测试数据,在油田采出水中加入YIM使Q235钢的腐蚀电位正移,腐蚀电流减小,腐蚀反应的阳极极化率增大,说明YIM为抑制阳极为主的缓蚀剂;在30～60℃区间温度的影响不明显,在70℃下YIM的缓蚀率有所降低。根据交流阻抗测试数据讨论了YIM对金属表面介电性质的影响。SEM观测证实YIM在金属表面形成了吸附膜。图5表5参6。An oleoamido imidazoline as corrosion inhibitor YIM is prepared from oleic acid and diethylenetriamine and its chemical structure is identified IR-spectrometrically. The static weight loss tests show that the inhibition rate of YIM at use level 50 mg/L and temperature 60℃ in an oilfield produced water with TSD=1.24×10~5 mg/L acounts 81.7%, 75.6%, and 74.6% for specimen of steel Q235, N80, and J55, respectively; with increasing CO_2 partial pressure (0.2—1.0 MPa) the inhibition rate of YIM decreases significantly for Q235, in less extent for J55 and in least extent for N80. The data from polarization curve measurements show that with YIM introduced into the water samples, the corrosion potential of Q235 becomes more positive, the corrosion current decreases and the anode polarizability in its corrosion reactions increases, which indicated that YIM is a corrosion inhibitor impeding mainly anode reactions; the change in temperature in range 40—60℃ influences the inhibiting efficiency of YIM weakly and at 70℃ the inhibition rate of YIM decreases in some extent. The effects of YIM on dielectric properties of the metal surfaces is discussed on the basis of alternative impedance measurements. The adsorption film formation by YIM is evidenced by SEM observations.

关 键 词：Q235钢 咪唑啉 金属表面 缓蚀性能 缓蚀率 阳极极化 失重法 酰胺 合成 并用 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TG174.42[金属学及工艺—金属表面处理]