發(fā)布時(shí)間：2018-06-02 19:35

  本文選題：鍍鋅板 + 無鉻鈍化�。� 參考：《安徽工業(yè)大學(xué)》2017年碩士論文

【摘要】：本論文以陽離子有機(jī)硅改性環(huán)氧樹脂為成膜物質(zhì),通過添加不同種類和不同含量的納米粒子和緩蝕劑,利用溶液共混的方法制得無鉻復(fù)合鈍化液。以馬鋼產(chǎn)熱鍍鋅板為成膜基材,制備復(fù)合鈍化膜,通過塔菲爾極化曲線、電化學(xué)交流阻抗譜、中性鹽霧加速腐蝕試驗(yàn)等方法研究鈍化膜的防腐性能。用陽離子穩(wěn)定劑水溶液合成陽離子改性聚吡咯水分散液,考察穩(wěn)定劑用量以及吡咯單體用量對(duì)聚吡咯水分散液合成的影響。結(jié)果表明:穩(wěn)定劑與吡咯的質(zhì)量比為10:1,吡咯含量為0.2%時(shí),能獲得穩(wěn)定的納米級(jí)聚吡咯水分散液。納米粒度儀測(cè)試結(jié)果表明其平均粒徑為141.8nm。以陽離子有機(jī)硅改性環(huán)氧樹脂和γ-縮水甘油醚氧丙基三甲氧基硅烷(KH560)為主要成膜物質(zhì),改變加入的單寧酸和聚吡咯水分散液的量,進(jìn)行正交實(shí)驗(yàn)。正交試驗(yàn)結(jié)果表明復(fù)合鈍化液的最優(yōu)配方為:陽離子有機(jī)硅改性環(huán)氧樹脂含量12.75%、KH560含量3.0%、PPy含量為0.01%、單寧酸為0.4%。對(duì)硅酸鎂鋰進(jìn)行陽離子化改性,以陽離子有機(jī)硅改性環(huán)氧樹脂為主要成膜物質(zhì),制備改性硅酸鎂鋰/有機(jī)硅改性環(huán)氧樹脂復(fù)合鈍化膜。通過改變改性硅酸鎂鋰在溶液中的含量,利用電化學(xué)測(cè)試復(fù)合鈍化膜的防腐性能。結(jié)果表明:硅酸鎂鋰/有機(jī)硅改性環(huán)氧樹脂復(fù)合鈍化液中,硅酸鎂鋰占成膜物質(zhì)的1%時(shí),復(fù)合涂層的防腐效果最佳,此時(shí)自腐蝕電流密度1.785×10-6(A·cm-2)、腐蝕電位值為-1.052V。固定硅酸鎂鋰占成膜物質(zhì)的1%,通過加入不同種類的緩蝕劑,測(cè)試緩蝕劑對(duì)復(fù)合鈍化液的影響。電化學(xué)結(jié)果表明:加入不同種類的緩蝕劑對(duì)鈍化膜的性能有影響,當(dāng)緩蝕劑含量分別為:鉬酸鈉含量為0.073%,釩酸鈉含量為0.18%,氟鈦酸銨含量為0.108%,單寧酸含量為0.6%,復(fù)合涂層的防腐蝕性能最佳;植酸的加入降低了復(fù)合涂層的耐蝕性能。以陽離子有機(jī)硅改性丙烯酸乳液為成膜物質(zhì),通過改變石墨烯的含量制備不同含量的石墨烯/陽離子有機(jī)硅改性丙烯酸乳液復(fù)合涂層。電化學(xué)測(cè)試結(jié)果表明:石墨烯的加入對(duì)涂層具有一定的影響。隨著石墨烯含量的增加,涂層的防腐性能逐漸增加,當(dāng)石墨烯含量為0.15%時(shí),涂層的防腐性能最佳。
[Abstract]:In this paper, cationic organosilicon modified epoxy resin was used as film forming material, chromium-free composite passivation solution was prepared by adding different kinds of nano-particles and corrosion inhibitors. The composite passivation film was prepared from hot-dip galvanized plate of Masteel. The anticorrosion performance of the passivation film was studied by means of Taffer polarization curve electrochemical impedance spectroscopy and neutral salt spray accelerated corrosion test. Cationic modified polypyrrole aqueous dispersion was synthesized from aqueous solution of cationic stabilizer. The effects of the amount of stabilizer and the amount of pyrrole monomer on the synthesis of polypyrrole aqueous dispersion were investigated. The results show that when the mass ratio of stabilizer and pyrrole is 10: 1 and the content of pyrrole is 0.2, a stable water dispersion of polypyrrole can be obtained. The average particle size is 141.8 nm. Cationic silicone modified epoxy resin and 緯 -glycidyl ether oxy propyl trimethoxysilane (KH 560) were used as main film-forming materials, and the amount of water dispersions of tannic acid and polypyrrole was changed, and orthogonal experiments were carried out. The results of orthogonal test showed that the optimum formula of the compound passivation solution was as follows: the content of cationic silicone modified epoxy resin was 12.75 and the content of KH560 was 3.0% and the content of PPy was 0.01.The content of tannic acid was 0.4wt%. The modified magnesium lithium silicate / silicone modified epoxy resin composite passivation film was prepared by cationic silicone modified epoxy resin as the main film forming material. By changing the content of modified lithium magnesium silicate in solution, the anticorrosion performance of the composite passivated film was measured by electrochemical method. The results show that when lithium magnesium silicate / silicone modified epoxy resin composite passivating solution, the composite coating has the best anticorrosive effect when lithium magnesium silicate occupies 1% of the film-forming material, and the corrosion potential is -1.052 V with a self-corrosive current density of 1.785 脳 10 ~ (-6) Acm ~ (-2). The effect of the inhibitor on the compound passivation solution was tested by adding different kinds of corrosion inhibitor. The electrochemical results showed that the performance of the passivation film was affected by the addition of different kinds of corrosion inhibitor. The corrosion resistance of the composite coating was decreased by the addition of phytic acid when the corrosion inhibitor content was 0.073 3 sodium molybdate 0.18% sodium vanadate 0.108 ammonium fluorotitanate 0.108 and 0.6% tannic acid respectively. The composite coating of graphene / cationic silicone modified acrylic emulsion was prepared by changing the content of graphene with cationic silicone modified acrylic emulsion as film forming material. The electrochemical test results show that the addition of graphene has a certain effect on the coating. With the increase of graphene content, the anticorrosive property of the coating increases gradually. When the content of graphene is 0.15, the anticorrosive property of the coating is the best.
【學(xué)位授予單位】：安徽工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG174.4

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本文編號(hào)：1969934