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摘要：本论文主要研究了751偏磷酸钠、七水合硫酸锌、聚丙烯酰胺和无水氯化钙制备一种分散剂-聚磷酸盐预膜剂，并且对制成的分散剂-聚磷酸盐预膜剂的分散和预膜性能做进一步的研究。
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实验主要是用红点法在不同条件下(例如不同浓度、溶液配比、pH、预膜时间等等)钝化后的A3碳钢片表面，选择3～5个测试点，然后逐点滴上CuSO4溶液(该溶液破坏钝化膜后产生如下反应：Fe+Cu2+==Cu↓+Fe2+)，并用秒表记录CuSO4点滴溶液由蓝色变为红色的时间，根据蓝色消失全部变为红色的时间快慢来评定钝化膜的质量。根据同一检测面上各点变色时间的长短差别来评定钝化膜的完整性和均匀程度。38137
结果表明用无水氯化钙、五水合硫酸锌、751偏磷酸钠和聚丙烯酰胺四种物质制备一种分散剂-聚磷酸盐预膜剂可行。四种物质最佳浓度是钙离子浓度C=100mg/L、锌离子浓度C=70mg/L、751偏磷酸钠浓度C=70mg/L、聚丙烯酰胺浓度C=70mg/L。最适宜的浓度配比是1，最适宜的pH值为6，最适宜的预膜时间为48小时。
毕业论文关键词：预膜剂；分散剂；红点法；分散和预膜效果；聚磷酸盐
The development of a dispersant - polyphosphate prefilming agent
Abstract: This paper mainly studies six partial sodium phosphate， zinc sulfate， polyacrylamide seven hydrated calcium chloride anhydrous and preparation of a dispersant poly phosphate pretreatment filming agent， a further research on the dispersion and pre-membrane performance and made dispersant poly phosphate prefilming agent.
The experiment is mainly red point method under different conditions (e.g.， different concentration， pH， ratio of solution， pre film time and so on) the A3 carbon steel surface passivation， select 3 ~ 5 test points， and then by dropping CuSO4 solution (the solution after reaction damages the passivation film is as follows: Fe+Cu2+==Cu+Fe2+ with a stopwatch)， CuSO4 drop solution changed from blue to red time， according to the quality of blue and disappeared into the red time speed to evaluate the passivation film. To evaluate the passivation film according to the length between the inspection surface discoloration time of each point on the integrity and uniformity.
The results show that the dispersant - polyphosphate prefilming agent can be composed by anhydrous calcium chloride， five hydrated zinc sulfate， six sodium sodium phosphate and PAM. The best concentrations of the four substances are calcium concentration C=70mg/L， zinc ion concentration C=100mg/L， six sodium concentration C=70mg/L， polyacrylamide concentration C=70mg/L. The optimum concentration ratio is 1， the optimum pH value is 6， the optimum membrane time is 48 hours.
Key words: prefilming agent; dispersant; red point method; dispersion and pretreatment; phosphate;
目录
1 绪论 1
1.1课题研究背景 1
1.2预膜剂的定义 2
1.3预膜剂的分类 2
1.3.1 羟基乙叉二磷酸(HEDP) 4
1.3.2低磷聚合物W-1 4
1.3.3 新型多元醇磷酸酯PAPE 4
1.3.4新型磺酸共聚物P-5 4
1.3.5聚丙烯酰胺(PAM) 4
1.4预膜剂的现状、特性和成膜机理 4
1.5预膜条件的研究 5
1.5.1钙离子浓度的影响 5
1.5.2pH值的影响 5
1.5.3预膜温度的影响 5
1.5.4锌离子浓度的影响 5
1.6预膜剂的应用和发展 6
1.7分散剂的定义 7