纯溶剂在船舶低碳钢表面挥发速率的测定与关联

涂料工业 , 2012, 42(9): 65-73. doi: 10.3969/j.issn.0253-4312.2012.09.016

纯溶剂在船舶低碳钢表面挥发速率的测定与关联

左阳 ^1, , 叶章基 ^2, , 谭振华 ^3, , 陈凯峰 ^4, , 王胜龙 ^5, , 戎宗明 ^6,

1.华东理工大学化学与分子工程学院,上海200237

2.中国船舶重工集团公司第七二五研究所厦门分部,福建厦门361002;海洋腐蚀与防护重点实验室,福建厦门361002

3.华东理工大学化学与分子工程学院,上海200237

4.中国船舶重工集团公司第七二五研究所厦门分部,福建厦门361002;海洋腐蚀与防护重点实验室,福建厦门361002

5.中国船舶重工集团公司第七二五研究所厦门分部,福建厦门361002;海洋腐蚀与防护重点实验室,福建厦门361002

6.华东理工大学化学与分子工程学院,上海200237

基金项目: 国家973计划项目(61310903)

关键词：挥发速率 , 挥发模型 , 溶剂 , 船用低碳钢

Experimental Determination and Estimation of the Evaporation Rate of Pure Solvents on the Surface of Low-Carbon Steel for Ship

在已有的溶剂挥发速率测定装置中,测定了22种纯溶剂在船用低碳钢上的相对挥发速率.采用由单相传质速率方程和能量守恒原理建立的溶剂挥发模型,结合多种气相传质系数方程对实验测得的挥发时间t90进行了关联和参数拟合.结果表明:由双膜理论给出的传质系数方程具有较好的综合效果,关联的平均相对误差为11.4％,与溶剂在滤纸和铝材上挥发的关联误差相当.所建立的模型能很好地计算各种温度下溶剂在低碳钢上的挥发曲线及底材温度变化曲线.

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