Corrosion Research Papers - Academia.edu (original) (raw)

Top Papers
Most Cited Papers
Most Downloaded Papers
Newest Papers
People
- by
- •
- Performance, Corrosion, Durability

TALAT Lecture 1252- Corrosion and Corrosion Protection 1252.01.02 Corrosion Types ....................................................................................4 (a) General... more

TALAT Lecture 1252- Corrosion and Corrosion Protection
1252.01.02 Corrosion Types ....................................................................................4
(a) General corrosion.............................................................................................5
(b) Crevice corrosion.............................................................................................6
(c) Poultice corrosion ............................................................................................7
(d) Fretting corrosion (also called traffic marking)...............................................7
(e) Stress corrosion................................................................................................8
(f) Galvanic Corrosion ..........................................................................................9
(g) Pitting Corrosion............................................................................................10
(h) Intergranular corrosion and exfoliation .........................................................11
1252.02 Electrochemistry and Aluminium...........................................................11
1252.02.01 Introduction .........................................................................................11
1252.02.02 Kinetic Reactivity................................................................................12
1252.02.03 The Electrochemical Circuit ...............................................................13
1252.02.04 Aluminium as a Cathode.....................................................................13
1252.02.05 Aluminium as an Anode......................................................................14
1252.02.06 Summary of Electrolytic Corrosion .

- by Professor Dr. Loutfy H . Madkour
- •
- Chemistry, Corrosion Science, Corrosion

This updated definitive publication on inorganic zinc silicate coatings is directed at the needs of all users of this remarkable protective coating. The publication features a compilation of papers published in Australia between 1937 and 2011. The papers focus on all aspects of inorganic zinc silicate protective coatings, providing a comprehensive examination of the history, development, chemistry and uses. It includes papers dealing with cure, breakdown mechanisms, microstructure and comparisons with multi-coat systems, organic zinc, metal spray and galvanizing. An overview provides a useful summary of each of the papers. A comprehensive reference book for engineers, paint chemists, specifiers, superintendents and maintenance personnel.

- by Rob Francis
- •
- Corrosion Science, Corrosion Engineering, Corrosion, Surface Coatings

1. Uniform (general) corrosion
2. Galvanic (two–metal) corrosion
3. Thermogalvanic corrosion
4. Crevice corrosion (including deposit corrosion)
5. Pitting, pitting corrosion
6. Selective attack, selective leaching (de–alloying)
7. Intergranular corrosion (including exfoliation)
8. Erosion corrosion
9. Cavitation corrosion
10. Fretting corrosion
11. Stress corrosion cracking
12. Corrosion fatigue

- by Professor Dr. Loutfy H . Madkour
- •
- Chemistry, Physical Chemistry, Corrosion Science, Corrosion

Classification of Corrosion
Based on the mechanism of corrosion, it is classified into two types
1. Chemical or dry corrosion
2. Electrochemical or wet corrosion
Dry corrosion:
· Corrosion takes place in dry state.
· In occurs due to the direct chemical attack of the metal by the
environment.
· Corrosion products accumulate on the same spot, where corrosion occurs.
· Dry corrosion is self controlled.
· It follows absorption mechanism.
· Homogenous metal surface undergoes corrosion observed.
· Uniform corrosions are observed. Example: Formation of mild iron oxide
on its surface.
Dry corrosion is a form of corrosion, that occurs at elevated
temperature without a liquid phase. It’s a high temperature oxidation
reaction.

- by Professor Dr. Loutfy H . Madkour
- •
- Chemistry, Corrosion

The inhibition effect of pomegranate peel extract (PPE) on the corrosion of mild steel in hydrochloric acid (HCl) solution was investigated. The polarization, mass loss, and electrochemical impendence techniques were used to evaluate the corrosion inhibition performance of the pomegranate peel extract. The results revealed that PPE acts as a corrosion inhibitor in HCl solution. The inhibition efficiency increased with the increase of extract concentration. The inhibition action was attributed to the adsorption of the chemical compounds present in the extract solution, on mild steel surface.

- by taghi rostamikia
- •
- Chemistry, Corrosion

The corrosion resistance of AISI 304 stainless steel (AISI 304 SS) and manganese stainless steel (low-nickel SS) brackets in artificial saliva was investigated. The cytotoxic effects of their corrosion products on L929 cell culture were compared by two assays, crystal violet, to evaluate cell viability, and MTT (3-[4,5-dimethylthiazol-2-yl]2,5-diphenyltetrazolium bromide), for cell metabolism and proliferation. The atomic absorption spectroscopic analysis of the corrosion products demonstrated that nickel and manganese ion concentrations were higher for the AISI 304 SS-bracket immersion solution as compared with the low-nickel SS brackets. Scanning electron microscopy and energy-dispersive spectroscopy demonstrated less corrosion resistance for the AISI 304 SS brackets. Although none of the bracket extracts altered L929 cell viability or morphology, the AISI 304 SS-bracket extracts decreased cellular metabolism slightly. The results indicated that the low-nickel SS presents better i...

- by Marcos Lenza
- •
- Materials Science, Dentistry, Cytotoxicity, Medicine
- by Frank Goodwin
- •
- Engineering, Materials Science, Thermodynamics, Metallurgy

A study of the effect of allium cepa extract as an inhibitor on mild steel corrosion in 0.5M HCl was made at ambient temperature. The experiments were performed with the weight loss/corrosion rate and potentiostatic polarization measurement techniques. Polarization measurement was performed using a potentiostat (Autolab PGSTAT 30 ECO CHIMIE) interfaced with a computer for data acquisition and analysis. Effective corrosion inhibition of the extract on the steel test specimens in the different concentrations of HCl used was achieved as indicated with the results obtained. There was increasing inhibition performance with increasing concentration of the extract inhibitor. The best inhibition performances were achieved at the lower exposure times for all the extract concentrations used in the 0.5 M HCl. A good correlation of results was obtained for the gravimetric and polarization experiments. A mixed type inhibitor is indicated with the results of ba and bc.

- by Roland T Loto
- •
- Chemistry, Corrosion Science, Corrosion Engineering, Corrosion

Numerous works are reported in literature concerning biofilm growth on surfaces in seawater, but the understanding of the adhesion mechanisms in the initial period after immersion is still subject to investigation. An improved knowledge of the biofilm adhesion mechanisms is essential for the development of an alternative approach to the currently-used antifouling agents, which are often harmful for the environment. Due to the complexity of the subject and to its interdisciplinary nature, these researches require collaboration between people working in different fields of science such as material science, surface analysis, chemistry, marine microbiology and biochemistry.

- by Jean Guezennec
- •
- Materials Science, Corrosion, Biofilm, Seawater
- by claudia grillo
- •
- Engineering, Chemistry, Electrochemistry, Cytotoxicity
- by Maaike Beeck
- •
- Materials Science, Packaging, Leaching, Corrosion
- by D. Northwood
- •
- Engineering, Performance, Scanning Electron Microscopy, Corrosion
- by Jean-baptiste Jorcin
- •
- Engineering, Scanning Electron Microscopy, Morphology, Comparative Study
- by Gerhard Schiroky
- •
- Engineering, Corrosion Science, Scanning Electron Microscopy, Morphology
- by Fakiha Heakal
- •
- Materials Engineering, Civil Engineering, Corrosion
- by Vladimir Zaitsev
- •
- Electrochemistry, Electrocatalysis, Corrosion

AISI 316 austenitic stainless steels have been plasma nitrided using a dc glow discharge unit in order to investigate the influence of gas composition on microstructure and corrosion behavior of treated samples. Corrosion properties of... more

- by Saeid Amiri
- •
- Materials Engineering, Condensed Matter Physics, Microstructure, Corrosion

Abstract
The surface characteristics and corrosion behaviour of the AZ31 magnesium alloy exposed to a high relative humidity (RH) atmosphere were investigated. During the first 15 days of humidity test at 98% RH and 50 °C, a significant increase of magnesium carbonate and a decrease of magnesium oxide were detected on the surface film by XPS; after this stage, increased exposure times did not produce substantial changes on the relative amounts of these compounds. The surface film of commercially pure magnesium, also examined for comparison purposes, revealed more magnesium carbonate and less magnesium oxide compared with the AZ31 alloy. Unlike the AZ31 alloy, the surface of pure Mg disclosed almost complete substitution of MgO by magnesium carbonate after 30 days of exposure time. Mass gain values of tested specimens and scanning electron microscope characterisation of corroded surfaces indicated lower corrosion susceptibility of the AZ31 alloy compared with the commercially pure Mg, suggesting superior chemical stability of the oxide/hydroxide film formed over the magnesium–aluminium alloy surface. XPS and energy dispersive X-ray (EDX) analyses did not revealed any substantial enrichment of aluminium in the corrosion products film on the AZ31 alloy after 30 days of testing. Copyright © 2008 John Wiley & Sons, Ltd.

- by S Feliu Jr
- •
- Corrosion Science, Corrosion Engineering, Corrosion
- by Dan Persson
- •
- Materials Engineering, Civil Engineering, Corrosion, Zinc
- by Frank Feyerabend
- •
- Corrosion, Multidisciplinary, Humans, Magnesium
- by Nathan Jacobson
- •
- Engineering, Materials Science, Corrosion, Thin Film
- by Mirna Urquidi-Macdonald
- •
- Materials Engineering, Civil Engineering, Materials Science, Prediction
- by Janusz W. Sobczak
- •
- Electron Microscopy, Biomaterials, Mass Spectrometry, Calcium
- by Stanley Vermilyea
- •
- Engineering, Nonparametric Statistics, Heat Treatment, Dental Materials
- by Babu Rao
- •
- Microstructure, Stress, Corrosion, Mathematical Geology
- by Oladele Isiaka
- •
- Thermodynamics, Corrosion, Sodium Chloride
- by Matthew Yao
- •
- Materials Engineering, Mechanical Engineering, Corrosion, Abrasive wear
- by William R Walsh and +3
- •
- Scanning Electron Microscopy, PHOTOELECTRON SPECTROSCOPY, Stents, Corrosion
- by Catherine French
- •
- Corrosion, Surveys
- by Priyangshu Sarma
- •
- Earth Sciences, Biofilms, Corrosion, Oil Industry
- by Martin Ferm and +1
- •
- Engineering, Cultural Heritage, Calcium, Environmental Monitoring

Oil transporting gas lines are exposed to corrosive–erosive wear mechanisms due to fluid flowconditions in gas transportation processes. Combined parameters like fluid flow regime and chemical composition of the wall deposited products increase oil gas pipes wearing. Corrosion–erosion laboratory tests on API X52 steel gradewere performed to study corrosion rate effect of inhibitors added to residualwater transported with gas in pipelines. Corrosion rate was measured by electrochemical methods when inhibitor concentration of 5, 50 and 100ppm were utilized. Corrosion products are easily loosened due to lack of
adherence and erosion is provoked by flowconditions with rapid pipe failure as a consequence. Fluid flow
conditions were simulated in dynamic laboratory tests which were performed using a rotating cylinder electrode. Results were compared with horizontal oil pipe sections failed. Using amine type inhibitors reduced corrosion rate, but wear rate is increased in dynamic testing as it happens in gas pipes.

- by Javier Rodrigo González López and +1
- •
- Corrosion Science, Oil and gas, Corrosion Engineering, Corrosion

This research reports the consequences of mass loss estimations by utilizing of oxygen scavengers in boilers to limit the consumption rate of carbon steel tubes. The consumption rate information was chosen from the literature as function of temperature, pressure, and inhibitors level. Consumption rate increased with increasing in temperature and pressure, and diminished with inhibitor level. Hydroquinone, ascorbic acid, and ethanolamine were utilized as consumption inhibitors. The present work is focused on deciding the artificial neural network (ANN) and mathematical formulas so as to increase great expectation properties. Five scientific models and five ANN display structures were recommended. Computer aided program was utilized for building up these models. The outcomes demonstrate that the polynomial mathematical model and multi-layer discernment can precisely anticipate the deliberate information with high relationship coefficients. Multi-Layer Perceptions (MLP) 3:3-4-1:1 was the best model over than the others with higher correlation coefficient.

- by Abdul Mun'em A . Karim
- •
- Chemical Engineering, Corrosion Science, Corrosion Engineering, Corrosion

The erosion-corrosion behavior of two corrosion-resistant alloys (UNS S42000 and UNS N08028) has been assessed under gaseous-liquid-solid impingement conditions. Erosion-corrosion impingement tests were conducted at three different impact angles and at three different impact velocities up to 60 m/s, and furthermore, pure erosion and pure corrosion impingement tests were run for UNS S42000, and carbon dioxide (CO2) at a pressure of 1,500 kPa was used as the gas phase. The sand content, with grain size below 150 μm, was 2.7 g/L brine. Artificial brine with a sodium chloride (NaCl) content of 2.7% was used as liquid phase. The damaged surfaces of samples exposed to the high-velocity multiphase flow were investigated using scanning electron microscopy (SEM) and an optical device for 3D surface measurements to assess the depth of attack. Electrochemical investigations according to ASTM G61 were performed to determine electrochemical behavior of tested materials including critical pitting potentials (Epit) and ...

- by Wolfgang Havlik
- •
- Materials Engineering, Civil Engineering, Materials Science, Corrosion
- by Paul P Conway
- •
- Production, Packaging, Experience Design, Corrosion

This experimental field study interrupted the protection current offered by Impressed Current Cathodic Protection (ICCP) to ten in-service reinforced concrete structures. The study aimed to identify the long-term effects of ICCP after it was recognised that some of the systems are now reaching the end of their design life and require a significant level of maintenance. It was found that after five or more years of ICCP, the steel remained passive for at least 24 months after interrupting the protection current despite chloride contamination that would represent a corrosion risk.

- by Gareth Glass
- •
- Materials Engineering, Mechanical Engineering, Civil Engineering, Concrete
- by Vesna Mišković-Stanković and +1
- •
- Genetics, Materials Science, Biomedical Engineering, Titanium
- by Lawrence Anovitz
- •
- Earth Sciences, Corrosion, Power Plant, Physical sciences
- by Ugur Malayoglu
- •
- Materials Engineering, Mechanical Engineering, Wear, Atomic Force Microscopy

This work describes the inhibition effect of different concentration of an aqueous extracted of Pe-ganum harmala seed on the corrosion of carbon steel in 1 M H2SO4 solution using potentiostatic polarization techniques at the temperature range (298-328) K. The result showed that the inhibition efficiency increased with increasing of extract inhibitor concentration and temperature. The adsorption of inhibitor on carbon steel surface was fit into Langmuir adsorption isotherm. Kinetic and thermodynamic parameters governing the corrosion and the adsorption process were calculated and discussed.

- by Haider Al-Mashhdani
- •
- Corrosion Science, Corrosion, Iron Alloys, Acidic Waters
- by Marco V. Boniardi
- •
- Corrosion Science, Metallurgy, Corrosion Engineering, Corrosion
- by Michela Bosetti
- •
- Biomaterials, Protein adsorption, Osseointegration, Cell Adhesion
- by Stig Karlsson and +1
- •
- Biofilms, Biomaterials, Protein adsorption, Atomic Force Microscopy