【摘要】：金屬包裝飲料罐因其密封性好、保質期長而被廣泛使用在飲料行業(yè)中。而金屬包裝罐的缺點之一就是易腐蝕。金屬包裝罐的腐蝕會致使飲料受污染或劣變從而威脅人們的身心健康,食品安全問題也越來越突出。目前,金屬包裝罐的腐蝕機理尚不明確。因此,研究金屬包裝飲料罐的腐蝕行為和失效機理,預測金屬包裝飲料罐的耐蝕壽命,這對于減少食品安全問題的發(fā)生具有極其重要的意義。首先,對金屬包裝飲料罐原材料馬口鐵在酸性飲料中的腐蝕電化學行為進行了探討。結果表明,浸泡初期,錫層腐蝕電流密度很高,達到40μA/cm2。浸泡中期,基體碳鋼開始暴露出來,仍以錫層溶解為主。浸泡后期,碳鋼腐蝕速度為14μA/cm2,其能夠承擔的耐蝕壽命很短。大約經過1個月的浸泡,錫層完全溶解。研究了酸性飲料罐罐體馬口鐵和罐底鋁之間的電偶腐蝕傾向,結果表明Sn-Al電偶對的電偶電位差為100mV左右,電偶電流為16μA/cm2左右。電偶腐蝕行為以Sn的腐蝕過程為主,屬于弱電偶腐蝕行為,可以忽略電偶腐蝕對金屬包裝飲料罐貨架壽命的影響。四種相同工藝生產的馬口鐵鈍化前后耐蝕性能的研究表明本文中使用的馬口鐵并未進行高效鈍化。而采用我們的鈍化方法對馬口鐵進行鈍化后,四種馬口鐵的耐蝕性明顯提高,其中F1馬口鐵鈍化效果最為明顯,表明我們采用的鈍化方法是合理和有效的。鍍錫量測定結果表明,F3馬口鐵鍍錫量誤差最小。在酸性飲料中彩印鐵的耐蝕性研究表明,經過11個月的浸泡后,彩印鐵的涂層電阻遠大于106Ω·cm2,表明彩印鐵環(huán)氧酚醛涂層此時仍然具有防護能力：低電位陰極極化加速彩印鐵涂層劣化過程與自然腐蝕狀態(tài)下彩印鐵涂層劣化過程具有很好的相關性,表明低電位陰極極化加速方法可以對彩印鐵的耐蝕壽命進行預測。其次,在大批次飲料實罐樣品的基礎上,通過統(tǒng)計分析,建立了以實罐涂層電阻Rc和Fe元素濃度為變量的金屬包裝飲料罐耐蝕壽命預測模型。該模型屬于機理型模型。運用該模型解析了紅牛飲料罐防護體系在飲料液作用下逐漸劣化和失效的兩個階段：第一階段是涂層快速滲水階段。第二階段是涂層下滲入介質積累和腐蝕積累階段。模型的轉折參數Rc.tp和[Fe]tp分別表示涂層滲水已到達金屬表面的涂層電阻和口味劣化的臨界鐵元素濃度值。從金屬飲料包裝空罐加速耐蝕實驗結果中可以看出,低電位加速腐蝕試驗結果與自然條件下飲料罐涂層失效過程的結果和模型行為一致,表明低電位陰極極化加速涂層失效試驗與自然腐蝕試驗具有良好的相關性。兩者結合可用于預測金屬包裝飲料罐的耐蝕質量水平,可作為日常檢測方法。
[Abstract]:Metal-packed beverage cans are widely used in the beverage industry because of their good sealing and long shelf life. And one of the disadvantages of the metal packaging tank is that it is easy to corrode. The corrosion of metal packaging can lead to contamination or deterioration of drinks, which threaten people's physical and mental health, and food safety problems are becoming more and more prominent. At present, the corrosion mechanism of metal packaging tank is not clear. Therefore, it is of great significance to study the corrosion behavior and failure mechanism of metal-packed beverage cans and to predict the corrosion-resistant life of metal-packed beverage cans, which is of great significance to reduce the occurrence of food safety problems. Firstly, the corrosion electrochemical behavior of metal packed drinking pot raw material tinplate in acidic beverage was discussed. The results show that the corrosion current density of tin layer is very high at the initial stage of immersion, which is up to 40 渭 A / cm2.. In the middle of immersion, the matrix carbon steel began to be exposed, still mainly dissolved in tin layer. At the later stage of immersion, the corrosion rate of carbon steel is 14 渭 A / cm2, and the corrosion-resistant life of carbon steel is very short. After about 1 month of immersion, the tin layer completely dissolved. The galvanic corrosion tendency between tinplate and aluminum in acid beverage tank was studied. The results show that the couple potential difference of Sn-Al pair is about 100mV and the galvanic current is about 16 渭 A / cm2. The corrosion behavior of Sn is mainly in the corrosion process, which belongs to weak galvanic corrosion. The influence of galvanic corrosion on shelf life of metal packaging beverage can be ignored. The study of corrosion resistance before and after passivation of four kinds of tinplate produced by the same process shows that the tinplate used in this paper has not been passivated efficiently. After passivation with our passivation method, the corrosion resistance of four kinds of tinplate was improved obviously, and the passivation effect of F1 tinplate was the most obvious, which indicated that the passivation method we used was reasonable and effective. The results of tin plating show that the error of tinning amount in F3 tinplate is the smallest. The corrosion resistance of color printing iron in acid beverage shows that after 11 months' immersion, the coating resistance of color printing iron is far greater than 106 惟 cm2,. The results show that the color printing iron epoxy phenolic coating still has the protective ability at this time: the low potential cathodic polarization accelerates the deterioration process of the color printing iron coating and the degradation process of the color printing iron coating under the natural corrosion condition has a good correlation with the degradation process of the color printing iron coating under the natural corrosion condition. The results show that the low-potential cathodic polarization acceleration method can predict the corrosion-resistant life of color-printed iron. Secondly, on the basis of a large number of solid beverage can samples, a corrosion-resistant life prediction model for metal packaging beverage cans is established, which takes the concentration of Rc and Fe elements as variables, based on the statistical analysis of the coating resistance of the real cans. The model belongs to the mechanical model. This model is used to analyze the two stages of gradual deterioration and failure of the protective system of Red Bull Beverage Tank under the action of beverage liquid. The first stage is the rapid infiltration stage of coating. The second stage is the accumulation of infiltration media and corrosion accumulation under the coating. The transition parameters of the model, Rc.tp and [Fe] tp, respectively, indicate the coating resistance and the critical iron concentration of poor taste when the coating has reached the surface of the metal. From the experimental results of accelerated corrosion resistance of metal beverage packaging empty cans, it can be seen that the results of low potential accelerated corrosion test are consistent with the failure process and model behavior of the coating of beverage cans under natural conditions. The results show that there is a good correlation between low potential cathodic polarization accelerated coating failure test and natural corrosion test. The combination of the two methods can be used to predict the corrosion resistance quality of metal packed beverage cans and can be used as a routine test method.
【學位授予單位】：中國海洋大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TB484.4;TG172

【相似文獻】

相關期刊論文 前10條

1 胡建華;我國金屬包裝行業(yè)存在的問題及發(fā)展思路[J];中國包裝工業(yè);2005年01期

2 ;創(chuàng)新:讓中國金屬包裝市場更輝煌[J];中國包裝工業(yè);2006年10期

3 ;金屬包裝市場 蘊藏巨大商機[J];有色金屬再生與利用;2006年12期

4 汪文瑋;;金屬包裝工業(yè)調研[J];包裝世界;2007年03期

5 張虹;;樹立科學發(fā)展觀 促進我國金屬包裝行業(yè)持續(xù)、穩(wěn)定、健康發(fā)展[J];印刷技術;2008年04期

6 郝發(fā)義;;消費者需求決定金屬包裝市場走向[J];印刷技術;2008年04期

7 ;英國金屬包裝業(yè)概況[J];印刷技術;2008年04期

8 張虹;;回顧與展望金屬包裝行業(yè)的2007與2008[J];印刷技術;2008年S1期

9 ;中國包裝盒獲國際金屬包裝大獎[J];印刷質量與標準化;2008年08期

10 ;中國盒子獲國際金屬包裝大獎[J];中國包裝工業(yè);2008年09期

相關會議論文 前3條

1 周云杰;;中國金屬包裝存在的問題及其出路[A];2010中國包裝行業(yè)人力資源發(fā)展戰(zhàn)略高峰論壇論文集[C];2010年

2 翟之榮;;金屬包裝改革開放20年回顧和新世紀發(fā)展戰(zhàn)略[A];二十一世紀的中國包裝——學術討論會論文集[C];2000年

3 劉寒;;金屬包裝物品的火災撲救分析探討[A];中國化學會第二十五屆學術年會論文摘要集（下冊）[C];2006年

相關重要報紙文章 前10條

1 中國包裝聯(lián)合會金屬容器委員會秘書長 張虹;金屬包裝行業(yè)市場分析[N];中國包裝報;2007年

2 飄塵;創(chuàng)新：我國金屬包裝市場主旋律[N];中國有色金屬報;2006年

3 甘肅省包裝技術協(xié)會;甘肅金屬包裝行業(yè)迎來發(fā)展機遇[N];中國包裝報;2008年

4 中國包裝聯(lián)合會金屬容器委員會;把握金屬包裝走勢 培育成熟市場環(huán)境[N];中國包裝報;2008年

5 中機;我國金屬包裝行業(yè)的發(fā)展機遇和前景[N];中國包裝報;2008年

6 中機;我國金屬包裝行業(yè)的發(fā)展機遇和前景[N];中國包裝報;2008年

7 吳剛;金屬包裝產業(yè)發(fā)展勢頭強勁[N];中國食品質量報;2008年

8 ;中國金屬包裝行業(yè)亟待思變求新[N];世界金屬導報;2009年

9 江山;金屬包裝的藝術靈感[N];中國食品報;2009年

10 本報記者 王小萱;我國金屬包裝業(yè)持續(xù)穩(wěn)定發(fā)展[N];中國食品報;2009年

相關博士學位論文 前1條

1 王海杰;金屬包裝飲料罐的腐蝕行為研究[D];中國海洋大學;2014年

相關碩士學位論文 前2條

1 鄭紅梅;TY金屬包裝公司營銷策略研究[D];中國海洋大學;2010年

2 廖位建;中國馬口鐵產品擴散中創(chuàng)新和模仿效應的研究[D];上海交通大學;2008年

，

本文編號：2432344