Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films
نویسندگان
چکیده
An aqueous hybrid inorganic/organic sol-gel solution composed of tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS) was applied on ZnFe (14 wt.% Fe) electrodeposited steel as a sacrificial layer. Two precursor contents were studied: 10 (SG10) 30 % (SG30). First, the morphology thickness films assessed by Scanning Electron Microscopy (SEM) observations. They revealed presence micro-cracks in without alkaline surface preparation due to pyramidal shape deposit. Then, corrosion resistance systems determined Electrochemical Impedance Spectroscopy (EIS) Neutral Salt Spray (NSS) test. All results indicated an improvement thanks SG films. However, protection provided SG10 film did not permit durably protect The combination SG30 promising deposit with increase low-frequency modulus delay product appearance during NSS
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ژورنال
عنوان ژورنال: Journal of Electrochemical Science and Engineering
سال: 2022
ISSN: ['1847-9286']
DOI: https://doi.org/10.5599/jese.1282