Co-MOF掺杂松香基醇酸树脂涂层的制备及其防腐蚀性能  

Preparation of Co-MOF Doped Rosin-Based Alkyd Resin Coating and Its Corrosion Protection Property

作　　者：文新萍 余会成 石展望 谭政亮 雷福厚 苏东荣 WEN Xinping;YU Huicheng;SHI Zhanwang;TAN Zhengliang;LEI Fuhou;SU Dongrong(Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,School of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning 530006,China;Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry,School of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning 530006,China;Guangxi Wuzhou Dragon-Fish Paint Industry Co.,Ltd.,Wuzhou 543001,China)

机构地区：[1]广西民族大学化学化工学院广西林产化学与工程重点实验室,南宁530006 [2]广西民族大学化学化工学院广西高校食品安全与药物分析化学重点实验室,南宁530006 [3]广西梧州龙鱼漆业有限公司,梧州543001

出　　处：《腐蚀与防护》2023年第11期7-11,共5页Corrosion & Protection

基　　金：广西重点研发计划(桂科AB18281024)。

摘　　要：以六水合硝酸钴[Co(NO_(3))_(2)·6H_(2)O]中钴离子为中心金属离子,均苯三甲酸(H_(3)BTC)为有机配体,通过水热法合成了钴基金属有机骨架(Co-MOF)材料,并采用扫描电子显微镜(SEM)及X射线衍射仪(XRD)对其进行表征。将制备的Co-MOF掺杂于松香基醇酸树脂中,然后涂于Q235低碳钢电极及马口铁片表面得到涂层试样。采用电化学测试、盐雾腐蚀试验等研究了Co-MOF的添加量对涂层防腐蚀性能的影响。结果表明:适量添加Co-MOF可以提高涂层的防腐蚀作用,但过量的Co-MOF容易引起颗粒团聚,从而降低涂层的保护作用;当松香基醇酸树脂中Co-MOF的添加量为0.2 g(质量分数约0.1%)时,腐蚀电流密度为1.63×10^(-6) A/cm~2,保护效率达到99.2%,而未添加Co-MOF涂层的腐蚀电流密度为29.10×10^(-6) A/cm~2,保护效率只有85.4%。Cobalt based organic framework(Co-MOF) material was synthesized by hydrothermal method with cobalt ion in cobalt nitrate hexahydrate [Co(NO_3)_2·6H_2O] as the central metal ion and homophenic acid(H_3BTC) as the organic ligand.And the Co-MOF was characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD).The prepared Co-MOF was doped in rosin-based alkyd resin,which was coated on the surfaces of Q235 mild steel electrode and tinplate to obtain coating samples.The effect of the dosage of Co-MOF on the corrosion protection of the coating was investigated by electrochemical test and salt-spray test.The results showed that proper addition of Co-MOF could increase the corrosion protection of the coating,but excessive Co-MOF was easy to cause agglomeration of particles,reducing the protective effect of the coating.When the Co-MOF dosage in the rosin-based alkyd resin was 0.2 g(about 0.1% of mass fraction),the corrosion current density was 1.63×10~(-6) A/cm~2,and the protection efficiency reached 99.2%.The corrosion current density of the coating without Co-MOF was 29.10×10~(-6) A/cm~2,and its protection efficiency was only 85.4 %.

关 键 词：金属有机骨架 球状钴 醇酸树脂 防腐蚀性能 

分 类 号：TQ633[化学工程—精细化工]