Effects of Velocity on Corrosion

CORROSION ◽  
1960 ◽  
Vol 16 (2) ◽  
pp. 86t-92t ◽  
Author(s):  
H. R. COPSON
Keyword(s):  
Corrosion Rate ◽  
Copper Alloy ◽  
Iron Copper ◽  
Erosion Corrosion ◽  
Velocity Effect ◽  
Corrosion Of Iron

Abstract Discusses effects of velocity of fluids on corrosion rate of metals. Explains relation between corrosion rate factors and velocity and velocity effect on corrosion of iron and other metals. Also discusses galvanic effects produced by changes in velocity. Includes discussion of erosion corrosion of iron, copper alloy and other alloys plus explanation of cavitation corrosion. 3.5.11

scholarly journals Corrosion Study of Iron and Copper Metals and Brass Alloy in Different Medium

2011 ◽  
Vol 8 (s1) ◽  
pp. S344-S348 ◽  
Author(s):  
Memon Samina ◽  
Abdul Karim ◽  
A. Venkatachalam
Keyword(s):  
Corrosion Rate ◽  
Brass Alloy ◽  
Corrosion Study ◽  
Iron Copper ◽  
Corrosion Of Iron

The corrosion of iron, copper and brass alloy has been investigated in different mediumi.e. HNO3, H3PO4, H2SO4, HCl, CH3COOH. The study reveals that corrosion rate increases in the order iron > copper > brass and for the medium the corrosion follows the order HNO3> H3PO4> H2SO4> HCl > CH3COOH. The rate of corrosion increases with increasing concentration of acid and with increase in time.

Arsenic removal by iron hydroxides, produced by enhanced corrosion of iron

2002 ◽  
Vol 2 (2) ◽  
pp. 237-245 ◽  
Author(s):  
K. Karschunke ◽  
M. Jekel
Keyword(s):  
Drinking Water ◽  
Corrosion Rate ◽  
Arsenic Removal ◽  
Galvanic Corrosion ◽  
Iron Hydroxides ◽  
Copper Release ◽  
Iron Copper ◽  
Oxygenated Water ◽  
Fine Iron ◽  
Corrosion Of Iron

Results of lab-scale experiments for arsenic removal from drinking water are presented. Arsenate(V)-ions were adsorbed on ferric hydroxides which were formed in-situ by corrosion of elemental iron in oxygenated water. Natural corrosion of fine iron wool was suitable to remove effectively high but realistic arsenic concentrations of 500 μg/L from drinking water. As the corrosion rate decreased significantly in time, two different methods to enhance the corrosion were tested and evaluated: galvanic corrosion using iron-copper contact elements and the application of an external voltage. The iron-copper contact elements showed promising results (a high and stable corrosion rate) but were bearing the risk of copper release when the contact broke down. The application of voltage led to an enhanced release of iron-ions but was coupled with a cathodic formation of hydrogen from water. The generation of hydrogen is a very undesirable effect for any practical application. Irrespective of the mode of corrosion, a post-treatment step (sand filtration) was required to remove the arsenic loaded rust particles from the effluent. In the final effluent, drinking water quality was reached by all the methods.

Strain Enhanced Corrosion in the Iron-Caustic System

CORROSION ◽  
1976 ◽  
Vol 32 (9) ◽  
pp. 353-357 ◽  
Author(s):  
RONALD B. DIEGLE ◽  
DAVID A. VERMILYEA
Keyword(s):  
Steady State ◽  
Corrosion Rate ◽  
Strain Rate ◽  
Electrolyte Concentration ◽  
Applied Strain ◽  
Crack Advance ◽  
Film Rupture ◽  
Applied Strain Rate ◽  
Corrosion Of Iron ◽  
Kinetics Of

Abstract Straining electrode experiments were performed to investigate the nature of strain enhanced corrosion of iron in caustic electrolyte. The strain enhanced corrosion rate was generally linearly dependent on applied strain rate, and its potential dependence paralleled that of steady-state polarization behavior on non-straining electrodes. Data was presented as ratios, in which is the corrosion rate in cm/s and is the corresponding strain rate. This ratio, which was shown in a previously published theory to be numerically equal to the crack advance per film rupture event during film rupture SCC, depended on electrochemical variables such as electrolyte concentration and temperature in a manner similar to the kinetics of caustic cracking. Conditions which are known to be marginal in producing caustic cracking resulted in values for of about 10−7 cm, in excellent agreement with a previously developed theory. It was concluded that strain enhanced corrosion in this system results from repetitive film rupture and repair during straining.

Synthesis of iron-copper alloy using electrical discharge machining

2018 ◽  
Vol 33 (14) ◽  
pp. 1531-1538 ◽  
Author(s):  
Jitendra K. Katiyar ◽  
Anuj Kumar Sharma ◽  
Basant Pandey
Keyword(s):  
Copper Alloy ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Iron Copper

Prognosis the Erosion-Corrosion Rates for Slurry Seawater Flow in Steel Pipeline Using Neural System

2014 ◽  
Vol 1025-1026 ◽  
pp. 355-360 ◽  
Author(s):  
Ahmed El-Shenawy ◽  
Mohamed Shehadeh
Keyword(s):  
Corrosion Rate ◽  
Turbulent Flow ◽  
Reynolds Numbers ◽  
Neural System ◽  
Time Interval ◽  
Steel Pipes ◽  
Erosion Corrosion ◽  
Laminar And Turbulent Flow ◽  
The Neural Networks ◽  
A New Technique

The work of this paper proposes a new technique for estimating and predicting erosion corrosion rate for laminar and turbulent flow in pipes. The technique depends on the neural networks Artificial Intelligent algorithms. Based on experimental results, which was applied to A 106 carbon-steel pipes, the networks are trained. Four velocities (Reynolds numbers) are used for laminar and four for turbulent regimes. The experiments also used seawater containment three different concentrations of sand. For each experiment the iron losses were measured six times in three hours’ time interval. The proposed estimating/predicting system managed to find values between the readings as well as predict the behavior of the erosion corrosion rate for extra three hours. The estimated/predicted results have been developed to find the transient zone between the Laminar and Turbulent flow regimes and investigating its effects on the erosion-corrosion behavior.

On the Microstructure and Erosion Corrosion Behavior of Laser Processed Nickel Aluminium Bronze

2020 ◽  
Vol 979 ◽  
pp. 157-161
Author(s):  
A.K. Lakshminarayanan ◽  
S.R. Koteswara Rao ◽  
K. Sridhar ◽  
A. Vignesh
Keyword(s):  
Corrosion Rate ◽  
Surface Hardness ◽  
Jet Impingement ◽  
Impact Angle ◽  
Fine Grain ◽  
Erosion Corrosion ◽  
Aluminium Bronze ◽  
Grain Formation ◽  
Processed Sample ◽  
Enhanced Surface

Slurry jet impingement test was carried out on a laser processed nickel aluminium bronze (NAB) and the results are compared with the as-cast NAB. It is observed that the invariably, erosion corrosion rate is increasing with the jet velocity. Also, as the slurry impact angle is increased, the erosion corrosion rate of laser processed and as-cast NAB decreased. The erosion corrosion rate of laser processed sample exhibited 28 % higher erosion resistance as compared to the as-cast NAB. Enhanced surface hardness and fine grain formation due to laser processed are the main reasons for the improvement in the erosion corrosion resistance.

scholarly journals Correction: Li, P., et al. Research on Erosion-Corrosion Rate of 304 Stainless Steel in Acidic Slurry via Experimental Design Method. Materials 2019, 12, 2330

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3181
Author(s):  
Ping Li ◽  
Yanjie Zhao ◽  
Libo Wang
Keyword(s):  
Stainless Steel ◽  
Experimental Design ◽  
Corrosion Rate ◽  
Design Method ◽  
304 Stainless Steel ◽  
Experimental Design Method ◽  
Erosion Corrosion

The authors wish to make the following corrections to this paper [...]

Effect of temperature gradient and sulfur dioxide addition on erosion – corrosion of iron- and nickelbased alloys

2008 ◽  
Vol 25 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Anna Nafari ◽  
Mats Norell ◽  
Urban Jelvestam ◽  
Jan-Erik Svensson ◽  
Lars Nyborg
Keyword(s):  
Sulfur Dioxide ◽  
Temperature Gradient ◽  
Effect Of Temperature ◽  
Erosion Corrosion ◽  
Corrosion Of Iron

Corrosion of Iron in an H2S-CO2-H2O System

CORROSION ◽  
1962 ◽  
Vol 18 (3) ◽  
pp. 119t-124t ◽  
Author(s):  
EDWARD C. GRECO ◽  
WILLIAM B. WRIGHT
Keyword(s):  
Hydrogen Sulfide ◽  
Corrosion Rate ◽  
Partial Pressure ◽  
Stress Cracking ◽  
Corrosion Studies ◽  
Partial Pressures ◽  
Sulfide Stress ◽  
Initial Drop ◽  
Corrosion Of Iron ◽  
Relationship Of

Abstract Corrosion studies of iron in an H2S-CO2-H2O System were made under static and dynamic conditions. The data indicated that there existed a certain hydrogen sulfide partial pressure, approximately 0.02 psia, above which hydrogen blistering occurred. Similar results with sulfide stress cracking were obtained. The hydrogen sulfide partial pressure at onset of cracking was 0.150 psia. Hydrogen sulfide became the controlling factor at very low partial pressures causing an initial drop in the corrosion rate. Apparently, the type of corrosion film formed controlled the corrosion rate. Changes in these films were observed to take place coincident with changes in corrosion rate and prevalence of hydrogen blisters. The relationship of these phenomena is discussed. 6.2.2, 8.4.3, 3.2.2, 3.5.8

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