Effects of Concentration and Temperature on Corrosion and Scale Inhibitive Behavior of Uncaria gambir Extract for Low-Carbon Steel in Cooling-Water Solution

2020 ◽  
Vol 56 (6) ◽  
pp. 746-753
Author(s):  
Jiraphan Pleanteangthume ◽  
Manthana Jariyaboon
Keyword(s):  
Carbon Steel ◽  
Water Solution ◽  
Cooling Water ◽  
Low Carbon Steel ◽  
Low Carbon

Influence of Iron Bacteria on the Corrosion Behavior of Carbon Steel: SEM Study

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
E. Hamzah ◽  
C. L. Khohr ◽  
Ahmad Abdolahi ◽  
Z. Ibrahim
Keyword(s):  
Carbon Steel ◽  
Cooling Water ◽  
Low Carbon Steel ◽  
Iron Hydroxides ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
X Ray ◽  
Iron Bacteria ◽  
Microbially Influenced Corrosion ◽  
Sem Study

In this work, the iron bacteria were cultured and inoculated into the cooling water before immersion, and low carbon steel coupons were immersed for one month. Then, microbially influenced corrosion (MIC) of carbon steel in the presence of these bacteria was investigated using scanning electron microscopy (SEM), x-ray diffraction spectroscopy (XRD) and weight loss methods. SEM results showed that large amounts of corrosion products and heterogeneous biofilm layer were formed on the coupon surface. SEM also revealed the uniform-pitting corrosion on the steel surface due to bacteria colonization. XRD results show that the main constituents present in corrosion product are composed of iron oxides and iron hydroxides. 

scholarly journals Comparison of Corrosion Rate on Paint Coated and Uncoated SS400 Steel

2017 ◽  
Vol 2 (1) ◽  
pp. 49
Author(s):  
Eko Hariyadi ◽  
Mohammad Jufri ◽  
Hasanuddin Hasanuddin
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
River Water ◽  
Water Solution ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Corrosion Attack ◽  
Coating Materials ◽  
Steel Strips ◽  
The Cost

To prevent corrosion in metal, especially carbon steel, always need efforts which considered expensive one. But, compared with costs and losts when the corrosion attack is not properly managed then the cost of efforts is much lower. The most popular method in preventing corrosion attack is by coating of metal which also has decorative objective. In this research, four coating materials were applied to the surface of low carbon steel strips (SS400) and as control uncoated SS400 steel strips were also employed. The steel strips then were dipped into electrolite solution consisted of 30% of consentration of H2SO4, and NaCl soluted in river water for 15 (fifteen) days. After the presetted time was elapsed, the steel strips then examined for lost of mass. It was found that the highest lost of mass was for unpolished uncoated one dipped in H2SO4 with corrosion rate of 4,566.06 mpy. The lowest lost was for paint coated one dipped in NaCl-river water solution with corroion rate of 0.64 mpy.

The corrosion performance of low carbon steel in feedwater for cooling water systems

2021 ◽  
Author(s):  
Ahmad Royani ◽  
Siska Prifiharni ◽  
Gadang Priyotomo ◽  
Arini Nikitasari ◽  
Sundjono
Keyword(s):  
Carbon Steel ◽  
Cooling Water ◽  
Low Carbon Steel ◽  
Water Systems ◽  
Low Carbon ◽  
Corrosion Performance

Protection of Low Carbon Steel in Industrial Cooling Water System by New Formulation

2020 ◽  
pp. 1-15
Author(s):  
Abdelhadi Rochdi ◽  
Rachid Touir ◽  
Mohamed Ebn Touhami
Keyword(s):  
Carbon Steel ◽  
Immersion Time ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Water System ◽  
Cooling Water ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Cooling Water System ◽  
Ph Range

This chapter studies the operational parameters effects, such as immersion time, corrosion products, and pH, on the inhibition efficiency against corrosion for low carbon steel in simulated cooling water system of the mixture 1 (10-3 M 3-MPOX + 20 ppm CTAB), which corresponds to the best inhibition efficiency. The results show that the corrosion inhibition performance of the studied mixture reinforces with immersion time and has a maximum in the pH range 6.5–7.5. In addition, the analysis of the results shows that there is a dependence of the pH value of the solution and the corrosion current density (icorr). Indeed, a correlation can be established between log (icorr) and the pH using the polynomial equation. Finally, the mixture 1 provides good protection for the attack materials. These studies were evaluated from the polarization curves (PP), electrochemical impedance spectroscopy (EIS).

Evaluation of Metallic Corrosion Caused by Alcohol Fuel and Some Contaminants

2010 ◽  
Vol 636-637 ◽  
pp. 1024-1029 ◽  
Author(s):  
M.R. Monteiro ◽  
A.R.P. Ambrozin ◽  
A.O. Santos ◽  
P.P. Contri ◽  
S.E. Kuri
Keyword(s):  
Carbon Steel ◽  
Crevice Corrosion ◽  
Tap Water ◽  
Water Solution ◽  
Low Carbon Steel ◽  
Quality Parameters ◽  
Transportation Systems ◽  
Low Carbon ◽  
Transportation Fuels ◽  
Alcohol Fuel

In the present work, it is evaluated the effect of water and other contaminants of alcohol fuel on the corrosion behavior of different materials, which can constitute vehicles, storage and transportation fuels systems. For such, 5 metallic materials (zamak, low-carbon steel, stainless steel, and two Al alloys) were chosen and 5 alcoholic solutions were prepared: anhydrous ethanol (AEAC; solution 1); hydrated ethanol (AEHC; solution 2); AEAC and water with some impurities (AEAC + 6 % “corrosive” water; solution 3); AEHC and water with some impurities (AEHC + 6 % “corrosive” water; solution 4); and, AEAC and tap water (AEAC + 6 % tap water; solution 5). The crevice corrosion was investigated in static immersion tests, which were carried out at 50 °C for 2 months. The evaluation of the corrosive process was carried out by visual inspection, weight loss, optic microscopy, and scanning electron microscopy (SEM). Also, some quality parameters of the alcoholic solutions (specific mass, alcoholic content, pH, and conductivity) was analyzed in order to determine the influence of corrosion of the materials on them. The results have shown that crevice corrosion of all materials mostly occurred in solutions 3-5, which had a high amount of water and impurities. Some corrosion rates in such solutions were 90-400 times higher than those obtained in AEAC and AEHC. Among the materials, zamak and carbon steel suffered severe corrosive attack. The physicochemical properties of alcoholic solutions employed in the tests also changed, mainly the increase of pH and conductivity was observed. Therefore, the results demonstrate that the quality control of alcohol fuel is essential in order to avoid the damage of engine parts and storage and transportation systems. Specially, water, sulphate, chloride and acetate content must be monitored.

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