scholarly journals The Role of Silica Fume Pigments in Corrosion Protection of Steel Surfaces

10.5772/32843 ◽  
2012 ◽  
Author(s):  
Nivin M. ◽  
Hesham Tawfik M. Abdel-Fatah
Keyword(s):  
Silica Fume ◽  
Corrosion Protection ◽  
Steel Surfaces

scholarly journals Effect of Different Lubricating Environment on the Tribological Performance of CNT Filled Glass Reinforced Polymer Composite

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2965
Author(s):  
Sandeep Agrawal ◽  
Nishant K. Singh ◽  
Rajeev Kumar Upadhyay ◽  
Gurminder Singh ◽  
Yashvir Singh ◽  
...  
Keyword(s):  
Tribological Performance ◽  
Hardened Steel ◽  
Dry Sliding ◽  
Gfrp Composites ◽  
Tribological Behaviour ◽  
Reinforced Polymer ◽  
Steel Surfaces ◽  
Lubrication Properties ◽  
Scanning Electron

In recent years, the engineering implications of carbon nanotubes (CNTs) have progressed enormously due to their versatile characteristics. In particular, the role of CNTs in improving the tribological performances of various engineering materials is well documented in the literature. In this work, an investigation has been conducted to study the tribological behaviour of CNTs filled with glass-reinforced polymer (GFRP) composites in dry sliding, oil-lubricated, and gaseous (argon) environments in comparison to unfilled GFRP composites. The tribological study has been conducted on hardened steel surfaces at different loading conditions. Further, the worn surfaces have been examined for a particular rate of wear. Field-emission scanning electron (FESEM) microscopy was used to observe wear behaviours. The results of this study explicitly demonstrate that adding CNTs to GFRP composites increases wear resistance while lowering friction coefficient in all sliding environments. This has also been due to the beneficial strengthening and self-lubrication properties caused by CNTs on GFRP composites, according to FESEM research.

Performance of coatings containing treated silica fume in the corrosion protection of reinforced concrete

2018 ◽  
Vol 47 (4) ◽  
pp. 350-359 ◽  
Author(s):  
Nivin M. Ahmed ◽  
Mostafa G. Mohamed ◽  
Reham H. Tammam ◽  
Mohamed R. Mabrouk
Keyword(s):  
Reinforced Concrete ◽  
Silica Fume ◽  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Dual Function ◽  
Core Shell ◽  
Protection Efficiency ◽  
Content Type ◽  
Anticorrosive Pigments

Purpose This study aims to apply novel anticorrosive pigments containing silica fume-phosphates (Si-Ph), which were prepared using core-shell technique by covering 80-90 per cent silica fume (core) with 10-20 per cent phosphates (shell) previously, to play dual functions simultaneously as anticorrosive pigments in coating formulations and as an anticorrosive admixture in concrete even if it is not present in the concrete itself. Two comparisons were held out to show the results of coatings on rebars containing core-shell pigments in concrete, and concrete admixtured with silica fume can perform a dual function as anticorrosive pigment and concrete admixture. The evaluation of corrosion protection efficiency of coatings containing core-shell pigments and those containing phosphates was performed. Design/methodology/approach Simple chemical techniques were used to prepare core-shell pigments, and their characterization was carried out in a previous work. These pigments were incorporated in solvent-based paint formulations based on epoxy resin. Different electrochemical techniques such as open-circuit potential and electrochemical impedance spectroscopy were used to evaluate the anticorrosive efficiency of the new pigments. Findings The electrochemical measurements showed that concrete containing coated rebars with core-shell pigments exhibited almost similar results to that of concrete admixtured with silica fume. Also, the anticorrosive performance of coatings containing Si-Ph pigments offered protection efficiency almost similar to that of phosphates, proving that these new pigments can perform both roles as anticorrosive pigment and concrete admixture. Originality/value Although the new Si-Ph pigments contain more than 80 per cent waste material, its performance can be compared to original phosphate pigments in the reinforced concrete.

scholarly journals On the Role of Trigger Signal Spreading Velocity for Efficient Self-Healing Coatings for Corrosion Protection

2018 ◽  
Vol 165 (16) ◽  
pp. C1017-C1027 ◽  
Author(s):  
Matthias Uebel ◽  
Loïc Exbrayat ◽  
Martin Rabe ◽  
The Hai Tran ◽  
Daniel Crespy ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Self Healing ◽  
Spreading Velocity ◽  
Trigger Signal

scholarly journals Poly(phenylene methylene)-Based Coatings for Corrosion Protection: Replacement of Additives by Use of Copolymers

2019 ◽  
Vol 9 (17) ◽  
pp. 3551 ◽  
Author(s):  
D’Elia ◽  
Magni ◽  
Trasatti ◽  
Schweizer ◽  
Niederberger ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Electrochemical Corrosion ◽  
Side Chains ◽  
Hydrophobic Coating ◽  
Corrosion Studies ◽  
Proper Design ◽  
Common Problems ◽  
Hydrocarbon Polymer ◽  
Protection Of The Metal

Poly(phenylene methylene) (PPM) is a thermally stable, hydrophobic, fluorescent hydrocarbon polymer. Recently, blended PPM has been proposed as a valuable anti-corrosion coating material, and, in particular, rheological additives such as external plasticizers resulted crucial to prevent crack formation. Accordingly, to avoid common problems related to the use of external plasticizers, the development of PPM-related copolymer-based coatings containing n-octyloxy side chains and their anti-corrosion behavior were explored in this study. The aluminum alloy AA2024, widely employed for corrosion studies, was selected as a substrate, covered with a thin layer of a polybenzylsiloxane in order to improve adhesion between the underlying hydrophilic substrate and the top hydrophobic coating. Gratifyingly, coatings with those copolymers were free of bubbles and cracks. The n-octyloxy side-chains may be regarded to adopt the role of a bound plasticizer, as the glass transition temperature of the copolymers decreases with increasing content of alkoxy side-chains. Electrochemical corrosion tests on PPM-substituted coatings exhibited good corrosion protection of the metal surface towards a naturally aerated near-neutrally 3.5% wt.% NaCl neutral solution, providing comparable results to blended PPM formulations, previously reported. Hence, the application of rheological additives can be avoided by use of proper design copolymers.

The role of MgO in the thermal behavior of MgO–silica fume pastes

2016 ◽  
Vol 127 (3) ◽  
pp. 1897-1909 ◽  
Author(s):  
Zhaoheng Li ◽  
Qijun Yu ◽  
Xiaowen Chen ◽  
Hao Liu ◽  
Jiyao Zhang ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Silica Fume
Sign in / Sign up

Export Citation Format

Share Document