Preparation and Property of Modified Epoxy Resin Chrome-free Docromet Coating

ZHANG Mingming; ZHANG Kebing; ZHANG Shenglin

doi:10.11973/fsyfh-201803013

Corrosion & Protection > 2018 > 39(3): 227-231,246. > DOI: 10.11973/fsyfh-201803013

ZHANG Mingming, ZHANG Kebing, ZHANG Shenglin. Preparation and Property of Modified Epoxy Resin Chrome-free Docromet Coating[J]. Corrosion & Protection, 2018, 39(3): 227-231,246. DOI: 10.11973/fsyfh-201803013

Citation:

PDF (1931 KB)

Preparation and Property of Modified Epoxy Resin Chrome-free Docromet Coating

School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China

More Information

Received Date: September 18, 2016

Graphical Abstract

Abstract

Abstract

The technology of preparing a chrome-free Dacromet coating with polyurethane modified epoxy resin instead of chromic anhydride was performed. The morphology and composition of the prepared coating were analysed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion resistance of the coating was evaluated by potentiodynamic polarization curve, electrochemical impedance spectroscopy (EIS), ammonium nitrate fast corrosion resistance test and salt water immersion test. The results showed that a dense, uniform and continuous film was formed through curing and cross-linking of resin, which effectively prevented the invasion of corrosive media and improved the corrosion resistance of the coating. The main components of the coating were Zn and Al, when the corrosive medium invaded, the zinc-aluminum powder was passivated to form oxide. The corrosion protection mechanism was mainly the shielding effect, electrochemical action and passivation effect.
- chromate-free Dacromet coating,
- modified epoxy resin,
- corrosion resistance,
- carbon steel

FullText(HTML)

References (22)

References

[1]	PIETROWSKI M,ZIELINSKIL M,WOJCIECHOWS-KA M. Selective reduction of chloronitrobebzene to chloroaniline on Ru/MgF₂ catalysts[J]. Catal Lett,2009,128:31-35.
[2]	HERINGER H K. Dacromet-a new protection for fasteners[J]. Product Finshing,1997(5):29.
[3]	胡会利,李宁,韩家军,等. 达克罗的研究现状[J]. 电镀与涂饰,2005,24(3):31-33.
[4]	马壮,黄圣玲,李智超,等. 达克罗技术近期研究进展[J]. 现代涂料与涂装,2008,11(6):16-18.
[5]	陈丽娇. 无铬达克罗工艺及耐蚀性研究[D]. 威海:哈尔滨工业大学,2007.
[6]	王再德,陈玲,焦明泉,等. 无铬达克罗钝化剂的选择[J]. 材料保护,2008,41(9):58-60.
[7]	江曼,毕渭滨,毛钢红,等. 新型无铬达克罗防腐材料[J]. 西北大学学报,2010,40(2):215-218.
[8]	鲁俊,梁英,汤尚文,等. 无铬达克罗涂料工艺及耐蚀性能研究[J]. 应用化工,2011,40(4):612-613,617.
[9]	张旭明,刘春明,王建军,等. 无铬达克罗成膜物质的研究进展[J]. 材料与冶金学报,2012(1).
[10]	张圣麟,乔静飞,张明明,等. 一种无铬达克罗涂液的制备方法:CN105348870A[P].2016-02-24.
[11]	乔静飞,张明明,李文超,等. 一种低铬达克罗涂层的制备工艺及性能[J]. 腐蚀与防护,2016,37(3):241-244.
[12]	蔡元兴. 环保型富锌涂层工艺与性能研究[D]. 济南:山东大学,2006.
[13]	孙天鹤,王宏波,王枝光,等. 聚氨酯改性环氧树脂的粘接性能研究[J]. 中国科技投资,2013(2):152-179.
[14]	安恩朋,李相波,程旭东,等. 达克罗涂层研究现状[J]. 腐蚀科学与防护技术,2014,26(1):73-76.
[15]	季利亚,姚正军. 无铬达克罗涂层的工艺研究[J]. 电镀与环保,2011,31(3):3-24.
[16]	李狄. 电化学原理[M]. 北京:北京航空航天大学出版社,1999:406.
[17]	杨丽霞,张三平,林安,等. 有机涂层渗水率及金属界面腐蚀的研究进展[J]. 材料保护,2001,34(10):28-30.
[18]	刘斌,李瑛,林海潮,等. 用EIS研究H₂O在环氧涂层中的传输行为[J]. 中国腐蚀与防护学报,2002,22(3):172-175.
[19]	曹楚南,张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002.
[20]	AMIRUDIN A,THIERRY D. Application of electrochemical impedance spectroscopy to study the degradation of polylmer-coated metals[J]. Progress of Organic Coatings,1995,26:1-28.
[21]	GRAY G S,BER ARD R A. EIS:electrochemical impedance spectroscope-a tool that can measure remaining life in protective coatings[C]//The Industrial Protective Coatings Conference and Exhibit. Floride:[s.n.]. 2003:209-227.
[22]	LIU J G,GONG G P,YAN C W. EIS study of corrosion behaviour of organic coating/Dacromet composite systems[J]. Electrochimica Acta,2005,50(16/17):3320-3329.

Cited By

Get Citation

PDF

XML

Article views (4) PDF downloads (4)

Turn off MathJax

Article Contents

Abstract

References

Preparation and Property of Modified Epoxy Resin Chrome-free Docromet Coating

Abstract

References

Catalog

Export File

Citation

Format

Content