水滑石/石墨烯自愈合材料增强富锌涂层防腐性能研究
Study on the anticorrosion performance of zinc-rich coatings enhanced by self-healing LDH/graphene materials
富锌涂层在严苛腐蚀环境中的“过活跃”响应会极大缩短其实际服役寿命。利用离子交换法与石墨烯锚定策略制备了一种水滑石/石墨烯自愈合材料,该材料通过物理屏蔽效应、牺牲阳极保护与智能自愈合作用相协同,用于增强富锌涂层对基体的腐蚀保护。通过离子交换法将缓蚀剂MBT负载至水滑石层间,制备了具有片状夹层结构的水滑石/石墨烯自愈合材料。表征结果表明,缓蚀剂通过离子交换法成功负载至水滑石层间。将该复合材料作为填料加入涂层中,研究了其对涂层防腐性能的影响。相应的电化学测试表明,该复合材料不仅具备优异的物理屏蔽性能,而且还表现出了良好的自愈合效果。与富锌涂层相比,自愈合材料增强富锌涂层在600 h时仍表现出稳定的阴极保护,并且划伤涂层的低频阻抗模值也至少提升了半个数量级。
The “over-active” response of zinc-rich coatings in harsh corrosive environment significantly shortens their actual service life.LDHs/Graphene self-healing material was prepared through ion exchange and graphene anchoring strategies.This material synergistically combines physical shielding effects,sacrificial anode protection,and intelligent self-healing to enhance the corrosion protection of zinc-rich coatings on substrates.The corrosion inhibitor MBT was loaded into the inter-layer space of LDHs via ion exchange,receiving a LDHs/Graphene self-healing material with a lamellar intercalated structure.Characterization results indicate that the corrosion inhibitor was successfully loaded into LDHs interlayer via ion exchange.The composite material was incorporated as a filler into coatings,and its impact on the coating’s anti-corrosion performance was investigated.Corresponding electrochemical tests revealed that the composite not only exhibits excellent physical shielding properties but also demonstrates good self-healing effects.Compared with the zinc-rich coating,the self-healing material-enhanced zinc-rich coating maintained stable cathodic protection even after 600 hours,and the low-frequency impedance modulus of the scratched coating was improved by at least half an order of magnitude.
self-healing / corrosion inhibitor / LDHs / graphene / cathodic protection
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
韩兴旺, 孙文, 王立达, |
| [6] |
韩兴旺. 水滑石/石墨烯多功能复合材料增强富锌涂层防腐性能研究[D]. 大连: 大连理工大学, 2024. |
| [7] |
|
| [8] |
|
| [9] |
周立犇. 基于层状双金属氢氧化物的离子刺激响应自修复环氧复合涂料的研究[D]. 镇江: 江苏科技大学, 2023. |
| [10] |
|
| [11] |
|
| [12] |
霍胜娟, 陈利红, 祝卿, |
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
王美. 埃洛石纳米管负载缓蚀剂型自愈涂层的制备与耐蚀性能[D]. 天津: 天津大学, 2019. |
国家自然科学基金项目(21978036)
/
| 〈 |
|
〉 |