The Influence of Leachate Water on Corrosion Rate of Mild Steel Plate

2021 ◽  
Vol 2 (2) ◽  
pp. 137
Author(s):  
Abdul Ghofur ◽  
Dhonie Adetya Rachman ◽  
Muhammad Mochtar Lutfi ◽  
Fathur Rahman
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Direct Contact ◽  
Steel Plate ◽  
Ambient Air ◽  
Water Pipe ◽  
Contact Duration ◽  
First Case ◽  
Living Organisms ◽  
Leachate Water

<p class="02abstracttext">Leachate water from final waste landfill (Tempat Pembuangan Akhir, TPA) contains harmful substances for the environment and living organisms. Furthermore, the leachate water can deteriorate equipment buried near TPA, e.g. buried water pipe. This work investigated the corrosion rate of mild steel SPCC SD after immersion in leachate water of TPA Gunung Kupang and Cahaya Kencana located in South Kalimantan. The steel plate immersion into leachate water was worked out in 3 different cases. The first case was 2 weeks immersion in leachate water followed by 1 week contact with ambient air. In the second case, steel plate was immersed in leachate water for 1 week and then 2 weeks in direct contact with ambient air. The last one was steel plate immersion in leachate water for 3 weeks without any direct contact with ambient air. The investigation shows that longer contact duration between wet steel surface, after immersion in leachate water, with ambient air increases the corrosion rate. The investigation shows also that the corrosion rate due to leachate water from Gunung Kupang landfill is higher than that of Cahaya Kencana landfill. Corrosion rate for TPA Gunung Kupang case varies from 0.441 to 0.718 mmpy. Meanwhile, corrosion rate for TPA Cahaya Kencana varies from 0.131 to 0.495 mmpy. This is due to lower pH of leachate water from TPA Mount Kupang.</p>

scholarly journals Interrelation between Marine Attaching Organisms and Corrosion Rate of Mild Steel Plate.

1998 ◽  
Vol 14 (2) ◽  
pp. 19-24
Author(s):  
Hidetosi WUSUI ◽  
Nobuhito NAKATANI ◽  
Tadahiko OHBA ◽  
Morihiko KUWA
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Steel Plate

The Influence of Seawater Velocity to the Corrosion Rate and Paint Degradation at Mild Steel Plate Immersed in Sea Water

2014 ◽  
Vol 554 ◽  
pp. 218-221 ◽  
Author(s):  
Manuhutu Ferry ◽  
W.B. Wan Nik ◽  
Che Wan Mohd Noor
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Flow Velocity ◽  
Water Flow ◽  
Steel Plate ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Flow Speed ◽  
Plate Surface ◽  
Water Flow Velocity

Mild steel is one of the materials that used to build ships and other marine construction which go through current, streams, waves with different speed. The aim of this study is to investigate the effect of seawater flow speed on the corrosion rate of mild steel and the paint thickness degradation. The simulation is done at laboratory scale using mild steel coupons exposure under different flow velocity of seawater that are 2 m/s, 4 m/s, 6 m/s and as control is used stationary flow, 0 m/s. Electrochemical impedance spectroscopy is used to determine the corrosion rate occurred on the coupons plate surface and its paint degradation as function of immersion time. Scanning electron microscopy also is used to observe the plate surface rust and the damage of paint which occurred during the experiment. Experiment is run for thirty days for every water flow speed and the data is taken every ten days. The result of this study revealed that the corrosion rate and paint degradation are increased by the increasing of water flow velocity which is proposed to validate seawater flow rate as parameter that increased the paint damage and corrosion rate of mild steel plate.

Adsorption and corrosion inhibition characteristics of two medicinal molecules

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Half Life ◽  
Thermodynamic Data ◽  
Inhibition Efficiency ◽  
Gravimetric Method ◽  
Corrosive Environment ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition characteristics of two medicinal molecules phenylalanine and rutin on mild steel in 1.0M Hydrochloric acid were evaluated using gravimetric method. Corrosion inhibition efficiency of 83.78 and 90.40 % was obtained respectively after seven days. However, phenylalanine showed weak accumulative higher corrosion inhibition efficiency. The presence of both molecules in the corrosive environment reduced the corrosion rate constant and increased the material half-life. Thermodynamic data calculated suggests a spontaneous adsorption of the molecules on the mild steel’s surface.

scholarly journals Controlling water evaporation through self-assembly

2016 ◽  
Vol 113 (37) ◽  
pp. 10275-10280 ◽  
Author(s):  
Kevin Roger ◽  
Marianne Liebi ◽  
Jimmy Heimdal ◽  
Quoc Dat Pham ◽  
Emma Sparr
Keyword(s):  
Self Assembly ◽  
Feedback Loop ◽  
Ambient Air ◽  
Underlying Mechanism ◽  
Water Evaporation ◽  
Air Humidity ◽  
X Ray ◽  
X Ray Scattering ◽  
Composition And Structure ◽  
Living Organisms

Water evaporation concerns all land-living organisms, as ambient air is dryer than their corresponding equilibrium humidity. Contrarily to plants, mammals are covered with a skin that not only hinders evaporation but also maintains its rate at a nearly constant value, independently of air humidity. Here, we show that simple amphiphiles/water systems reproduce this behavior, which suggests a common underlying mechanism originating from responding self-assembly structures. The composition and structure gradients arising from the evaporation process were characterized using optical microscopy, infrared microscopy, and small-angle X-ray scattering. We observed a thin and dry outer phase that responds to changes in air humidity by increasing its thickness as the air becomes dryer, which decreases its permeability to water, thus counterbalancing the increase in the evaporation driving force. This thin and dry outer phase therefore shields the systems from humidity variations. Such a feedback loop achieves a homeostatic regulation of water evaporation.

Evaluation of environmentally friendly inhibitor for corrosion of mild steel in phosphoric acid solution: unconventional approach

2018 ◽  
Vol 65 (5) ◽  
pp. 506-514 ◽  
Author(s):  
Khalid Rashid ◽  
Anees Khadom
Keyword(s):  
Corrosion Rate ◽  
Phosphoric Acid ◽  
Acid Solution ◽  
Mild Steel ◽  
Design Method ◽  
Correlation Coefficients ◽  
Environmentally Friendly ◽  
Phosphoric Acid Solution ◽  
Content Type ◽  
Phenolic Components

PurposeThe purpose of this study is to investigate the corrosion inhibition of mild steel alloy in 2 M H3PO4solution by the pomegranate peel extract as a friendly inhibitor was studied at various temperatures, inhibitor concentrations and immersion times.Design/methodology/approachA weight loss method was used to evaluate the corrosion rate. The experimental Taguchi design method was used for the distribution of experiments. The experimental design gave results which were impossible to show graphically. However, this problem was solved effectively with the aid of regression analysis.FindingsCorrosion rate increased with temperature according to Arrhenius equation. It was found that the efficiency of inhibition was increased with an increase in the concentration of inhibitor and immersion time. However, this diminishes with increased temperature. According to Langmuir isotherm, the inhibitor was adsorbed physically on steel surface. The negative sign of estimated heat of adsorption suggests a stable spontaneous inhibition process. Combination of mathematical and statistical analysis was proposed to demonstrate the results of corrosion rate with high correlation coefficients. In addition, Fourier transform infrared spectrometer examinations confirmed that the organic inhibitor consists of phenolic components as main materials.Originality/valueUsing unconventional approach for evaluation of environmentally friendly inhibitor for corrosion of mild steel in phosphoric acid solution.

Comments on Vaughan: “The Tearing Strength of Mild Steel Plate”

1982 ◽  
Vol 26 (01) ◽  
pp. 50-52
Author(s):  
G. Woisin
Keyword(s):  
Mild Steel ◽  
Steel Plate ◽  
Simple Metal ◽  
Metal Plates ◽  
Tearing Strength

The title paper [1] 2 has been of great interest in view of similar tests, with simple metal plates, conducted in 1966 by the author's company [2, 8]. We offer the following comments on Mr. Vaughan's paper.

KETAHANAN BALISTIK LEMBARAN BAJA PADA BERBAGAI SUDUT TEMBAK

ROTASI ◽  
2014 ◽  
Vol 16 (1) ◽  
pp. 34
Author(s):  
Rusnaldy Rusnaldy ◽  
Ismoyo Haryanto ◽  
Norman Iskandar ◽  
Binar Ade Anugra ◽  
Ahmad Zaedun
Keyword(s):  
Mild Steel ◽  
Steel Plate ◽  
Angle Of Attack ◽  
Oblique Impact ◽  
Experimental Results ◽  
Normal Impact ◽  
Impact Angles

Results of study on the performance of 0.4 mm mild steel plate when impacted by 4.5 mm diameter steel ogive-shaped projectile at 45o, 60o (oblique impact) and 90 o (normal impact) angles of attack are presented. The projectiles were fired at highest velocity using air riffle gun. The target-holding fixture was located at a distance of 2 m from the gun. Experimental results show that steel plate provides protection at 45o and 60o obliquity, but fails to provide protection at angle of attack of 90o (normal impact)

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