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

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.

Download Full-text

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

Water Science & Technology Water Supply ◽

10.2166/ws.2002.0069 ◽

2002 ◽

Vol 2 (2) ◽

pp. 237-245 ◽

Cited By ~ 4

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.

Download Full-text

Effects of Velocity on Corrosion

CORROSION ◽

10.5006/0010-9312-16.2.130 ◽

1960 ◽

Vol 16 (2) ◽

pp. 86t-92t ◽

Cited By ~ 18

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

Download Full-text

Strain Enhanced Corrosion in the Iron-Caustic System

CORROSION ◽

10.5006/0010-9312-32.9.353 ◽

1976 ◽

Vol 32 (9) ◽

pp. 353-357 ◽

Cited By ~ 1

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.

Download Full-text

The Corrosion of Iron in High-Temperature Water (Part 1—Corrosion Rate Measurements)

CORROSION ◽

10.5006/0010-9312-13.6.19 ◽

1957 ◽

Vol 13 (6) ◽

pp. 19-32 ◽

Cited By ~ 4

Author(s):

L. DOUGLAS ◽

F. C. ZYZES

Keyword(s):

High Temperature ◽

Corrosion Rate ◽

High Temperature Water ◽

Corrosion Of Iron ◽

Temperature Water

Download Full-text

Corrosion of Iron in an H2S-CO2-H2O System

CORROSION ◽

10.5006/0010-9312-18.3.119 ◽

1962 ◽

Vol 18 (3) ◽

pp. 119t-124t ◽

Cited By ~ 16

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

Download Full-text

Corrosion Study of Carbon Steel in Carbonated BUMEA-2EE Nonaqueous Solution

Journal of Physics Conference Series ◽

10.1088/1742-6596/2076/1/012057 ◽

2021 ◽

Vol 2076 (1) ◽

pp. 012057

Author(s):

Fang Liu ◽

Xiaoqian Du ◽

Lemeng Wang ◽

Dong Fu

Keyword(s):

Aqueous Solution ◽

Carbon Steel ◽

Corrosion Rate ◽

Mass Fraction ◽

Nonaqueous Solution ◽

Influence Of Temperature ◽

Corrosion Study ◽

Equipment Corrosion ◽

Polarization Behaviour

Abstract Different effort has been attempted to reduce the equipment corrosion of CO2 absorption using chemical solvents. In this paper, the corrosion of carbon steel in carbonated 2-(butylamino)ethanol (BUMEA)-2-ethoxyethanol (2EE) non-aqueous solution was studied by using a CHI602E electrochemical analyser. The polarization behaviour and corrosion rate of carbon steel in non-aqueous blends of BUMEA-2EE were investigated. The influence of temperature, the mass fraction of BUMEA (wBUMEA) and CO2 loading (α) on the corrosion rate were clarified.

Download Full-text

Effect of nitrate and chromate on the localized corrosion of iron and nickel

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19812834 ◽

1981 ◽

Vol 46 (11) ◽

pp. 2834-2841 ◽

Cited By ~ 2

Author(s):

Jaromír Toušek

Keyword(s):

Activation Energy ◽

Corrosion Rate ◽

Competitive Adsorption ◽

Localized Corrosion ◽

Favourable Effect ◽

Water Molecules ◽

Metal Dissolution ◽

Breakdown Potential ◽

Passivation Potential ◽

Corrosion Of Iron

The combined effect of some inorganic inhibitors - chromate and nitrate - on the rate of localized corrosion of iron and nickel was investigated. The efficiency of these inhibitors and the mechanism of their effect were found to depend on the potential. If the breakdown potential is lower than the second passivation potential, the corrosion rate decreases owing to the competitive adsorption of inhibitor and of aggresive ions and owing to a change in the activation energy of the metal dissolution. Substances that are strongly adsorbed on the electrode act in this region as strong inhibitors. In the range of the second passivation potential there operates another mechanism consisting in a favourable effect of the water molecules in the inhibitor hydration sphere on the rate of the passivation reaction. In this range, even such substances that are only weakly adsorbed on the electrode can act as strong inhibitors.

Download Full-text

Drinking Water Distribution - the Effect of Natural Organic Matter (NOM) on the Corrosion of Iron and Copper

Water Science & Technology ◽

10.2166/wst.1999.0432 ◽

1999 ◽

Vol 40 (9) ◽

pp. 17-24 ◽

Cited By ~ 14

Author(s):

A. Elfström Broo ◽

B. Berghult ◽

T. Hedberg

Keyword(s):

Organic Matter ◽

Corrosion Rate ◽

Natural Organic Matter ◽

Water Distribution ◽

Theoretical Calculations ◽

Field Measurements ◽

Product Release ◽

Drinking Water Distribution ◽

Corrosion Of Iron ◽

Equilibrium Calculations

The objective was to study the influence of natural organic matter (NOM) on the corrosion and by-product release of iron and copper. The corrosion was studied using potentiodynamic sweeps, coupon tests and field measurements in different Swedish municipalities. For iron it was found that the corrosion rate decreases in the presence of NOM. The results are explained in terms of surface complexation and a good correlation is found between theoretical calculations and experimental results. In the case of copper it was found that NOM both increases the corrosion rate and the content of copper in the water after one night of stagnation. The results are compared with equilibrium calculations and a good correlation is achieved.

Download Full-text