The corrosion behavior of ferrous materials immersed in acidic-media using D-optimal design

2019 ◽  
Vol 16 (4) ◽  
pp. 647-656 ◽  
Author(s):  
Daniel Obregón Valencia ◽  
Halter García Sánchez ◽  
Isabel Díaz Tang
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Optimal Design ◽  
Corrosion Rate ◽  
Response Surface ◽  
Ferric Chloride ◽  
Chloride Solutions ◽  
Content Type ◽  
Corrosion Rates ◽  
Steel Aisi

Purpose The purpose of this paper is to model the corrosion rate behavior for two ferrous materials, carbon steel AISI 1020 and stainless steel AISI 304, immersed in ferric sulfate and ferric chloride solutions using D-optimal design with response surface methodology. Design/methodology/approach Experimental design addresses two factors (concentration and contact time) with multilevel categories, in order to predict and compare the corrosion rates of the studied materials immersed in flocculants solutions. A corrosion rate of specimens was calculated from mass loss determinations. Findings The authors used a polynomial model to fit the experimental values, thereby predicting significantly higher corrosion rates in ferric chloride solutions, as compared to ferric sulfate. Originality/value The authors propose a high fidelity model of the corrosion rate of each carbon steel and stainless steel material using D-optimal design with a response surface method (RSM).

scholarly journals The Influence of The Marine Bacillus Cereus Mc-1 Over Carbon Steel, Stainless Corrosion And Copper Coupons

2021 ◽  
Author(s):  
Paulo Moreira-Filho ◽  
Paloma de Paula da Silva Figueiredo ◽  
Artur Capão ◽  
Luciano Procópio
Keyword(s):  
Stainless Steel ◽  
Control System ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Bacillus Cereus ◽  
Copper Alloy ◽  
Culture Medium ◽  
316L Stainless Steel ◽  
Corrosion Rates ◽  
Nitrate Supplementation

Abstract The present study evaluated the influence of the marine bacteria Bacillus cereus Mc-1 on the corrosion of 1020 carbon steel, 316L stainless steel, and copper alloy. The Mc-1 strain was grown in a modified ammoniacal citrate culture medium (CFA.ico-), CFA.ico- with sodium nitrate supplementation (NO3-), and CFA.ico- with sodium chloride supplementation (NaCl). The and mass loss and corrosion rate were evaluated after the periods of seven, 15, and 30 days. The results showed that in CFA.ico- and CFA.ico- medium added NO3- the corrosion rates of carbon steel and copper alloy were high when compared to the control. Whereas the medium was supplemented with NaCl, despite the rates being above the averages of the control system, they were considerably below the previous results. In general, the corrosion rates induced by Mc-1 on 316L coupons were below the results compared to carbon steel and copper alloy. When analyzing the corrosion rate measurements, regardless of the culture medium, the corrosion levels decreased consistently after 15 days, being below the levels evaluated after seven days of the experiment. Our analyzes suggest that B. cereus Mc-1 has different influences on corrosion in different metals and environmental conditions, such as the presence of NO3- and NaCl. These results can help to better understand the influence of this bacteria genus on the corrosion of metals in marine environments.

Corrosion of Aluminized Steel in Seawater

2004 ◽  
Author(s):  
Hiroki Kimoto
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Flow Rate ◽  
Galvanic Corrosion ◽  
Al Alloy ◽  
Corrosion Rates ◽  
Aluminized Steel ◽  
Alloy Carbon ◽  
Galvanic Couples

The influence of flow rate of seawater on the corrosion rate of hot-dipped aluminized steel in seawater was investigated using the following galvanic couples: aluminum/carbon steel, aluminum/Fe-Al alloy, aluminum/stainless steel, Fe-Al alloy/carbon steel, Fe-Al alloy/stainless steel, and carbon steel/stainless steel. The corrosion rate of aluminum in all the couples was greater than that of aluminum not connected with other metals. The corrosion rates increased in the following order: aluminum/carbon steel > aluminum/stainless steel > aluminum/Fe-Al alloy. Aluminum connected with carbon steel had the greatest corrosion rate: seven times of the rate of aluminum that was not connected with other metals. The galvanic corrosion rate of carbon steel is 1.9 to 2.5 times greater than that of carbon steel that is not connected with other metals.

The Corrosion of Carbon Steel and Stainless Steel in Simulated Geothermal Media

1985 ◽  
Vol 38 (8) ◽  
pp. 1133 ◽  
Author(s):  
BG Pound ◽  
MH Abdurrahman ◽  
MP Glucina ◽  
GA Wright ◽  
RM Sharp
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Stainless Steels ◽  
Polarization Resistance ◽  
Iron Sulfide ◽  
Low Carbon Steel ◽  
Passive Films ◽  
Low Carbon ◽  
Corrosion Rates ◽  
Good Agreement

The corrosion rates of low-carbon steel, and 304, 316 and 410/420 stainless steels in simulated geothermal media containing hydrogen sulfide have been measured by means of the polarization resistance technique. Good agreement was found between weight-loss and polarization resistance measurements of the corrosion rate for all the metals tested. Carbon steel formed a non-adherent film of mackinawite (Fe1 + xS). The lack of protection afforded to the steel by the film resulted in an approximately constant corrosion rate. The stainless steels also exhibited corrosion rates that were independent of time. However, the 410 and 420 alloys formed an adherent film consisting mainly of troilite ( FeS ) which provided only limited passivity. In contrast, the 304 and 316 alloys appeared to be essentially protected by a passive film which did not seem to involve an iron sulfide phase. However, all the stainless steels, particularly the 410 and 420 alloys, showed pitting, which indicated that some breakdown of the passive films occurred.

scholarly journals The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective

2021 ◽  
Vol 1201 (1) ◽  
pp. 012079
Author(s):  
S B Gjertsen ◽  
A Palencsar ◽  
M Seiersten ◽  
T H Hemmingsen
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Organic Acid ◽  
Carbonic Acid ◽  
Acid Corrosion ◽  
Iron Concentration ◽  
Critical Factor ◽  
Steel Corrosion ◽  
Carbon Steels ◽  
Corrosion Rates

Abstract Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to investigate how the corrosion rates on carbon steel is affected by acids typically present in the transported pipeline fluids. This investigation may contribute to the development of improved models. In a series of experiments, the corrosion rate differences for pure CO2 (carbonic acid) corrosion and pure organic acid corrosion (acetic acid and formic acid) on X65 carbon steel were investigated at starting pH values; 4.5, 5.3, or 6.3. The experiments were conducted in deaerated low-salinity aqueous solutions at atmospheric pressure and temperature of 65 °C. The corrosion rates were evaluated from linear polarization resistance data as well as mass loss and released iron concentration. A correlation between lower pH values and increased corrosion rates was found for the organic acid experiments. However, the pH was not the most critical factor for the rates of carbon steel corrosion in these experiments. The experimental results showed that the type of acid species involved and the concentration of the undissociated acid in the solution influenced the corrosion rates considerably.

Synergistic Effect of Thiourea and Surfactants on Corrosion Inhibition of Stainless Steel-410 in Presence of Sulfuric Acid

2014 ◽  
Vol 699 ◽  
pp. 186-191 ◽  
Author(s):  
Sami Ullah ◽  
Mohd Shariff Azmi ◽  
Muhammad Nadeem ◽  
Mohammad Azmi Bustam ◽  
Shaukat Ali Shahid ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Inhibitor Concentration ◽  
Corrosion Rates ◽  
Inhibition Performance ◽  
Triton X

The inhibition of corrosion of stainless steel (SS)-410 in sulfuric acid using thiourea and three different surfactants, cetyle trimethyl ammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and X-Triton was studied. Corrosion rates were determined by using corrosion coupons. The corrosion rate was found to be decreased with increase in inhibitor concentration. It was observed that the maximum corrosion inhibition occurred in the post micellar concentration of the surfactants. By optimizing the corrosion inhibition performance of different blends of surfactants and thiourea in 3 M H2SO4,the corrosion inhibition order was found as: Triton X-100 + thiourea > CTAB + thiourea > SDS + thiourea. The best results obtained by the addition of 200 ppm thiourea in 500 ppm of Triton X-100 in 3 M H2SO4acid solution. This blend decreased the corrosion rate of SS-410 to 657.66 mpy.

Influence of the Compressive Stress on the Corrosion of Petroleum Casing Premium Connection Material

2012 ◽  
Vol 512-515 ◽  
pp. 1919-1922
Author(s):  
Cheng Xian Yin ◽  
Xin Hu Wang
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Carbon Steel ◽  
Yield Strength ◽  
Corrosion Rate ◽  
Compressive Stress ◽  
Water Solution

In order to find the corrosion cause of petroleum casing premium connection material, the fixture was design to simulate material enduring compressive stress, and the fixture was put in high temperature autoclave, and the corrosion rate of two kind casing material(carbon steel and stainless steel) enduring compressive stress were test in H2S and CO2 and Cl- water solution. The result was that compressive stress accelerated the corrosion of petroleum casing steel, and when compressive stress was greater than the value half as the yield strength the corrosion rate increased quickly.

scholarly journals Corrosion Behavior of Materials Al5083 Alloy, 316L Stainless Steel and A681 Carbon Steel in Seawater

2021 ◽  
Vol 44 (2) ◽  
pp. 39-46
Author(s):  
Gina Genoveva ISTRATE ◽  
Alina Crina MUREȘAN
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Aluminium Alloys ◽  
Saturated Calomel Electrode ◽  
Open Circuit ◽  
Carbon Steels ◽  
Test Technique

In this paper the corrosion behavior of different materials has been evaluated based on exposure in seawater. The laboratory immersion test technique has been applied to evaluate the effect of seawater on the corrosion behavior of different materials. In three sets of experiments, carbon steels (A681 Type O7), austenitic stainless steels (316L) and aluminium alloys (Al5083) were utilized. The specimens were fixed fully submerged in seawater. The corrosion process was evaluated using weight loss method, open-circuit potential measurements (OCP) and polarization techniques. To determine gravimetric index and the rate of penetration, samples were immersed in corrosive environment for 89 days and weighed periodically. The electrochemical experiments were conducted with a Potentiostat/Galvanostat (PGP 201) analyzer. It was connected to a PC. The Voltamaster software was used for electrochemical data analysis. A three-electrode cell composed of a specimen as a working electrode, Pt as counter electrode, and saturated calomel electrode (SCE) (Hg (l)/ Hg2Cl2 (s)) as a reference electrode were used for the tests. The weight loss tests revealed the lowest corrosion rate values for stainless steel and aluminium alloys, indicating a beneficial use for these materials in marine environments. The potentiodynamic method shows that the lowest corrosion rate in seawater (2.8 μm /year) was obtained for the Al5083 alloy, and the highest value of the corrosion rate (41.67 μm/year) for A681 carbon steel.

scholarly journals DETERMINATION OF ATMOSPHERIC CORROSION RATE OF METALS IN 12 VIETNAMESE AREAS

2018 ◽  
Vol 55 (5B) ◽  
pp. 272
Author(s):  
Pham Duy Nam
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Rural Areas ◽  
Atmospheric Corrosion ◽  
Climatic Factors ◽  
Air Pollutant ◽  
Climatic Data ◽  
Corrosion Rates ◽  
Copper Aluminum

The corrosion of materials is a result of complex impact from many climatic factors such as temperature, humidity, air pollutant content in the air, rainfall etc. In addition, the corrosion rate of metals can be measured. Each climatic zone is characterized by its corrosion rate. This article presents the testing results to determine the corrosion rate of carbon steel, copper, aluminum and zinc in 12 districts characterizing different climate zones of Vietnam. Testing, evaluation, and classification of atmospheric corrosion were conducted in accordance with the standard ISO 9223. The results show that for all types of studied metals, their corrosion rates which are determined from climatic data are higher than the corrosion rates in reality, especially for carbon steel and aluminum. This difference is more visible in the rural areas.

scholarly journals An Experimental Study on the Erosion-Corrosion Performance of AISI 1018 Carbon Steel and AISI 304L Stainless Steel 90-Degree Elbow Pipe

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1260 ◽  
Author(s):  
Khan ◽  
Ya ◽  
Pao
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Slug Flow ◽  
Silica Sand ◽  
Corrosion Mechanism ◽  
304L Stainless Steel ◽  
Aisi 304L ◽  
Aisi 304L Stainless Steel ◽  
Erosion Corrosion

Erosion-corrosion is an unavoidable material degradation process in flow pipelines transporting abrasive particles with carrier fluids. In this study, the multiphase flow loop apparatus is employed to assess the erosion-corrosion behavior and mechanism relative to AISI 1018 carbon steel (CS) and AISI 304L stainless steel (SS) 90° long radius elbows with the inner diameter of 50.8 mm. Fine silica sand of 50 µm average size was used as a dispersed phase and erosion-corrosion tests were conducted for slug flow conditions. The erosion-corrosion analysis of 90° elbows was determined from its surface morphologies before and after the experiment using confocal and scanning electron microscopy (SEM). The direct mass loss was measured to quantify the erosion-corrosion rate of the elbow configurations. Additionally, multilayer paint modeling experiments were performed to relate qualitative inferences on erosion distribution and location with the erosion-corrosion mechanism. It was observed that the erosion or corrosion pitting mechanism prevailed on the 1018 CS elbow surface, and the 304L SS displayed excellent erosion-corrosion resistance properties. Moreover, the erosion-corrosion rate was found to be 4.12 times more in the 1018 CS compared to the 304L SS with the maximum particle impaction identified at the exit of the horizontal-horizontal (H-H) 90° elbow for slug flow.

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