Materials for Anticorrosive Protection of Cellular Bodies of Rotatory Air Preheaters from Energentic Installations. Modification and Rheological Characterization of Some Epoxy  Resins

Bantas, Adriana; Cioroianu, Lelian; Cioroianu, Gabriela; Leca, Minodora; Pica, Alexandra; Marcovsci, Claudiu

Adriana Bantas, Lelian Cioroianu, Gabriela Cioroianu, Minodora Leca, Alexandra Pica, Claudiu Marcovsci

Materials for Anticorrosive Protection of Cellular Bodies of Rotatory Air Preheaters from Energentic Installations. Modification and Rheological Characterization of Some Epoxy Resins

Abstract:

Celualar bodies from the cold region of the heat exchange surface of rotatory air preheaters from energetic installations are strongly affected by sulphuric corrosion and, can be protected using heat conducting and thermally resistant coatings. Epoxy resins, mofied firstly with tall and soy fatty acids to increase their elasticity and then reacted with acrylic acid and styrene to increase chemical, heat and corrosion resistance, adherence and elasticity, correspond to the qualities required for the film-forming material. The thermal conductivity of coating can be increased by introducing finely dispersed metal powders. Rheological measurement emphasizes that the resins esterified with both kinds of fatty acids have relatively low viscosities, ranging between 3500 and 8600 mPa.s, and ideal plastic fluid behaviour; the higher the epoxy equivalent of the resin the lower the viscosity of the esters. Treatment of resins (previoisly esterifies with tall fatty acids) with the two monomers increases the viscosity and modifies the rheological behaviour, transforming it into a pseudoplastic one. The increase of viscosity is huge for the resin having lower epoxy equivalent and its behaviour becomes thixotropic. Given the high specific weight of metal powders , it is expected that this last modified resin gives the most stable film-forming disperse systems with metal powders.

Keywords:
modified epoxy resins; rheological behaviour; corrosion protection; viscosity

Issue: 2008, Volume 59, Issue 4

Pages:

Publication date: 2008/5/9

https://doi.org/10.37358/RC.08.4.1807

Download Pdf Article

This article is published under the Creative Commons Attribution 4.0 International License

<<<< back

PUBLISHING SECTION

Author Guidelines

* Paper Drafting

* Paper Template

* Ethical Statement

* Paper Submission

Ghidul Autorului (ro)

Open Access & Archiving Policy

Search Authors

LATEST NEWS
	NUMAR OMAGIAL PETRU PONI.. detalii
	Revista de Chimie - 70 de ani de aparitie neintrerupta.. detalii
	English-Romanian Dictionary for Mechanical Engineering (download pdf)