【摘要】：目的運(yùn)用響應(yīng)面分析法考察緩蝕劑2-羥基膦乙酸(HPAA)的緩蝕效果。方法通過(guò)單因素靈敏度分析法考察p H值、HPAA質(zhì)量濃度、溫度對(duì)Q235鋼腐蝕的影響,確定取值范圍。基于響應(yīng)面優(yōu)化分析法(RSM),根據(jù)單因素實(shí)驗(yàn)結(jié)果,采用中心組合設(shè)計(jì)原則(CCD)對(duì)質(zhì)量濃度、溫度、p H值進(jìn)行優(yōu)化實(shí)驗(yàn)設(shè)計(jì)。以HPAA的緩蝕率為響應(yīng)值,采用RSM對(duì)響應(yīng)數(shù)值進(jìn)行方程回歸,對(duì)得到的二次關(guān)聯(lián)模型進(jìn)行優(yōu)化,并將優(yōu)化的參數(shù)條件應(yīng)用于復(fù)配緩蝕劑進(jìn)行SEM和EIS分析。結(jié)果質(zhì)量濃度、溫度、p H值的優(yōu)化取值范圍分別為20~26 mg/L,45~55℃和8~10。RSM優(yōu)化后參數(shù)為:質(zhì)量濃度23 mg/L,溫度50℃,p H=9.0,HPAA的緩蝕率最優(yōu)為68.68%。實(shí)驗(yàn)獲得的緩蝕率為68.78%,與預(yù)測(cè)值偏差為0.15%。將優(yōu)化的參數(shù)應(yīng)用于緩蝕劑的復(fù)配,ρ(HPAA)∶ρ(Na2MOO4)∶ρ(Na2B4O7)=0.5∶0.3∶0.5時(shí),復(fù)配的緩蝕劑用量最少且緩蝕率最高可達(dá)到93.75%。此復(fù)配緩蝕劑在SEM圖中光亮無(wú)腐蝕,并且在EIS譜中表現(xiàn)出純電容性,阻抗最大、緩蝕率最高。結(jié)論響應(yīng)面法和SEM,EIS結(jié)合運(yùn)用在HPAA的緩蝕性能研究中是可行、準(zhǔn)確、可靠的。
[Abstract]:Objective to investigate the corrosion inhibition effect of 2-hydroxyphosphine acetate (HPAA) by response surface analysis (RSM). Methods the influence of pH value and temperature on corrosion of Q235 steel was investigated by single factor sensitivity analysis. Based on the response surface optimization method (RSM), the central combination design principle (CCD) was used to optimize the mass concentration and temperature value of (RSM), according to the experimental results of single factor. Taking the corrosion inhibition rate of HPAA as the response value, the response value was regressed by RSM equation, the quadratic correlation model was optimized, and the optimized parameter conditions were applied to the SEM and EIS analysis of the complex corrosion inhibitor. Results the optimal range of mass concentration, temperature pH was 20 ~ 26 mg / L ~ 4555 鈩，

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