Corrosion Performance of Epoxy Coatings by Chemical Modification with Silanes

Authors

Liang LIU, Department of Chemistry,Zhejiang University,Hangzhou 310027,China;
Wei-gang JI, Department of Chemistry,Zhejiang University,Hangzhou 310027,China;Department of Chemistry,Third Military Medicine University,Chongqing 400038,China;
Ji-ming HU, Department of Chemistry,Zhejiang University,Hangzhou 310027,China;
Jian-qing ZHANG, Department of Chemistry,Zhejiang University,Hangzhou 310027,China;State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;
Chu-nan CAO, Department of Chemistry,Zhejiang University,Hangzhou 310027,China;State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;

Abstract

The improvement of corrosion performance of epoxy coatings by modification with "active" and "non-active" silanes is presented."Active" silanes are defined as ones having functional groups that can react with the epoxy groups in the epoxy resin,usually amino-silanes."Non-active" silanes are defined as ones not reacting with the epoxy groups,but can react with the hydroxyl groups in the epoxy backbone by the condensation reactions under the catalysis of organic tin compounds.The FTIR results showed that both the "active" and "non-active" silanes had been successfully grafted onto the epoxy resin.Electrochemical impedance spectroscopy(EIS) and accelerated corrosion test(Machu test) showed that the corrosion performance of epoxy coatings could be improved by chemical modification with both the "active" and "non-active" silanes.

Keywords

epoxy resin, chemical modification, silane, corrosion performance

DOI Link

https://doi.org/10.61558/2993-074X.1973

Publication Date

2009-05-28

Online Available Date

2009-05-28

Revised Date

2009-05-28

Received Date

2009-05-28

Recommended Citation

Liang LIU, Wei-gang JI, Ji-ming HU, Jian-qing ZHANG, Chu-nan CAO. Corrosion Performance of Epoxy Coatings by Chemical Modification with Silanes[J]. Journal of Electrochemistry, 2009 , 15(2): 163-169.
DOI: 10.61558/2993-074X.1973
Available at: https://jelectrochem.xmu.edu.cn/journal/vol15/iss2/8

References

[1]Van Ooij W J,Zhu D,Stacy M,et al.Corrosion pro-tection properties of organofunctional silanes—An over-view[J].Tsinghua Science and Technology,2005,10:639-664.
[2]Liu L(刘倞),Hu J M(胡吉明),Zhang J Q(张鉴清),et al.Progress in anti-corrosive treatment of met-als by silanization[J].Journal of Chinese Society forCorrosion and Protection,2006,26:59-64.
[3]Subramanian V,van Ooij W J.Silane based metal pre-treatments as alternatives to chromating[J].SurfaceEngineering,1999,15:168-172.
[4]Sundararajan G P,van Ooij W J.Silane based pretreat-ments for automotive steels[J].Surface Engineering,2000,16:315-320.
[5]van Ooij W J,Zhu D Q,Prasad G,et al.Silane basedchromate replacements for corrosion control,paint adhe-sion,and rubber bonding[J].Surface Engineering,2000,16:386-396.
[6]Seth A,van Ooij W J.Novel,water-based high-per-formance primers that can replace metal pretreatmentsand chromate-containing primers[J].Journal of Mate-rials Engineering and Performance,2004,13:468-474.
[7]Seth A,van Ooij W J,Puomi P,et al.Novel,one-step,chromate-free coatings containing anticorrosionpigments for metals—An overviewand mechanistic study[J].Progress in Organic Coatings,2007,58:136-145.
[8]Ji W G,Hu J M,Zhang J Q,et al.Reducing the waterabsorption in epoxy coatings by silane monomer incorpo-ration[J].Corrosion Science,2006,48:3731-3739.
[9]Zhu D,van Ooij W J.Corrosion protection of metals bywater-based silane mixtures of bis-[trimethoxysilylprop-yl]amine and vinyltriacetoxysilane[J].Progress in Or-ganic Coatings,2004,49:42-53.
[10]Ji W G,Hu J M,Liu L,et al.Water uptake of epoxycoatings modified withγ-APS silane monomer[J].Progress in Organic Coatings,2006,51:439-443.
[11]Zhang J T,Hu J M,Zhang J Q,et al.Studies of wa-ter transport behavior and impedance models of epoxy-coated metals in NaCl solution by EIS[J].Progress inOrganic Coatings,2004,51:145-151.
[12]Ji W G,Hu J M,Liu L,et al.Improving the corro-sion performance of epoxy coatings by chemical modifi-cation with silane monomers[J].Surface&CoatingsTechnology,2007,201:4789-4795.
[13]Zhou J M,Lucas J P.Hygrothermal effects of epoxyresin.Part II:variations of glass transition temperature[J].Polymer,1999,40:5513-5522.
[14]Fellahi S,Chikhi N,Bakar M.Modification of epoxyresin with kaolin as a toughening agent[J].Journal ofApplied Polymer Science,2001,82:861-878.
[15]Tejedor MI,Raredes L,Anderson MA.Evaluation ofATR-FTIR spectroscopy as an“in situ”tool for follow-ing the hydrolysis and condensation of alkoxysilanesunder rich H2O conditions[J].Chemistry of Materi-als,1998,10:3410-3421.
[16]Ji W G,Hu J M,Liu L,et al.Enhancement of corro-sion performance of epoxy coatings by chemical modifi-cation with GPTMS silane monomer[J].Journal ofAdhesion Science and Technology,2008,22:77-92.
[17]van Ooij W J,Zhu D.Electrochemical impedancespectroscopy of bis-[triethoxysilylpropyl]tetrasulfide onAl 2024-T3 substrates[J].Corrosion,2001,57:413-427.