冷喷涂Cu-Cu_2O涂层防污性能研究

Study on Antifouling Effect of Cold Spray Cu-Cu_2O Coating

通过冷喷涂技术制备了4种不同Cu、Cu2O配比的Cu-Cu2O涂层,涂层组分表征实验及实海防污挂片实验结果表明:在喷涂过程中,Cu粉和Cu2O粉均没有出现大量氧化现象,涂层的主要防污组分Cu2O能够顺利制备到涂层中;在喷涂过程中Cu2O粉不能100%利用,10%Cu2O-90%Cu、20%Cu2O-80%Cu和30%Cu2O-70%Cu粉末制备的涂层中Cu2O实际的质量分数分别为8.35%、15.72%、22.57%;Cu2O对Cu涂层溶解的促进作用和Cu2O自身与Cl-的反应,使涂层中Cu2O含量越高,铜离子渗出率越大。20%Cu2O-80%Cu涂层和30%Cu2O-70%Cu涂层的铜离子渗出率始终保持在50μg/(cm2·d)以上,可以抑制绝大部分海生物的附着;实际涂层样板在厦门海域分别浸泡1个月、3个月、13个月,各时段防污效果最好的始终是30%Cu2O-70%Cu涂层。

Four kinds of Cu - Cu2 O coatings were prepared by cold spray technology. The coating component characterization experiment and antifouling experiment showed that Cu pow-der and Cu2O powder did not show a large number of oxidation during the spraying process and the major antifouling component of Cu2O could be mixed into the coating system easily. The Cu2O powder could not reached 100% utilization during spraying. The actual mass ratios of Cu2O were 8. 35%, 15. 72%, 22. 57% respectively in the coatings that were prepared by 90% Cu2O - 10% Cu,80% Cu2O - 20% Cu and 70% Cu2O - 30% Cu powder. Due to facilita- ting role of Cu2O on the corrosion of Cu and the reaction of Cu2O and C1^-, the more Cu2O in the coating, the greater leaching rate of copper ions. The copper ions leaching rates of 20% Cu2O-80% Cu and 30% Cu2O-70% Cu coatings were maintained at more than 50 μg/（ cm^2·d）,which could prevent majority of marine foulings from adhesion. The 30% Cu2O-70%Cu coating shown the best antifouling effect after immersion in Xiamen sea area for 1 month, 3 months and 13 months.