Corrosion rate of AA 7050 in 3.5% NaCl environment with sodium chromate (Na2CrO4) inhibitor variation

Wulandari, Pramesti A D; Ilman, Mochammad Noer

doi:10.1051/matecconf/201819712002

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…sedangkan untuk plat sendiri ada yang untuk plat tebal dan plat tipis. Pada penilitan ini, tebal plat yang digunakan adalah 2 mm, sehingga dimensi spesimen untuk uji tarik sesuai ASTM E8 (Wulandari & Ilman, 2018), seperti terlihat pada Gambar 1. Gambar 2.…”

Section: Methodsunclassified

Analisis Distribusi Tegangan pada Sambungan Las Dissimilar antara ASTM A36 Steel dan AISI 304 dengan Solidworks

Maarif¹

2022

Preprint

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Simulation in the welding process is needed in today's technological era, this is to speed up the process and also reduce losses caused by failures in the welding process. Currently, there are many software that can be used to perform welding analysis. One of the familiar software used for welding simulations is Solidworks. This study aims to analyze the stress distribution and analyze the value of safety or the factor of safety in the dissimilar weld joint between ASTM A36 Steel and AISI 304 with the type of butt joint. The magnitude of the tensile force used for the simulation process is 10,000 N, 11,000 N, 12,000 N, and 13,000 N. Based on the simulation results of Solidworks on the dissimilar weld joint between ASTM A36 Steel and AISI 304, the results show that the tensile force of 10,000 N has not been able to break the connection. Meanwhile, the tensile strength of 11,000 N to 13,000 N was able to break the dissimilar weld joint, but the fracture was in the ASTM A36 Steel specimen. The simulation results of the factor of safety (FOS) or thedissimilar welded joints’ safety value show that all FOS values are low, namely between 0.3 to 0.4. Where this low value indicates that the analyzed weld joint is unsafe at a force load of 10,000 N to 13,000 N.

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Section: Methodsunclassified

Analisis Distribusi Tegangan pada Sambungan Las Dissimilar antara ASTM A36 Steel dan AISI 304 dengan Solidworks

Maarif¹

2022

Preprint

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“…For decades, chromate was the best choice for corrosion inhibition of strong oxidants because of its cost and benefit (Wulandari and Ilman, 2018). However, the toxicity of its hexavalent form encourages research on non-toxic and more environmentally acceptable inhibitors (Wise et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibitor system for blocking polymer well by potassium persulfate injection

Cheng

Cao

Sang

et al. 2021

ACMM

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Purpose This paper aims to clarify the corrosion inhibition effect of different corrosion inhibitor systems on the corrosion of metal pipe string by potassium persulfate plugging agent, so as to improve the injection capacity of polymer plugging well and reduce the corrosion of steel by oxidant plugging agent. Design/methodology/approach The effect of different corrosion inhibitors on the corrosion inhibition of N80 carbon steel in 1% potassium persulfate solution was studied by electrochemical experiment and weight loss experiment. The corrosion inhibition mechanism of potassium persulfate inhibitor and the synergistic mechanism among different inhibitors were analyzed. Findings The results indicated that when the temperature was 50°C, the inhibition effect of 0.2% sodium molybdate with a single inhibitor was the best at pH 8.5, and the inhibition rate was 70.17%. The inhibition efficiency of 0.2% sodium molybdate + 0.3% sodium silicate in the composite inhibition system can reach 94.38%. In the temperature range of 20°C–60°C, with the increase of system temperature, the inhibition effect of corrosion inhibitor will gradually weaken. Originality/value The corrosion inhibition system of N80 steel in potassium persulfate oxidant was mainly studied, and it clarified the influence of temperature and pH value on the corrosion inhibition effect, which provided guidance and suggestions for the corrosion inhibition of tubular string in the oilfield.

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The Effectiveness of Na2CrO4 to Inhibit Corrosion Rate of a A106 Grade Pipe in the Furnace Circulating Cooling Water with the Weight Loss Method on Pipe Lifetime Determining

Palupi,

Ma'wa

2024

DDF

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Pipes from industrial process flow diagrams have a predictable risk of failure or damage, so that periodic inspections are carried out. Corrosion that occurs in the pipe can cause a risk of leakage or blockage of the pipe flow which can be fatal to the fluid distribution process. This damage can be anticipated by inhibitors adding and predicting the corrosion rate. This research was conducted to determine the effective concentration of Na2CrO4 inhibitor to inhibit the corrosion rate and predict the lifetime of the furnace cooling water circulation pipe using the weight loss method. Na2CrO4 inhibitor is a type of anodic inhibitor that works by passively the anode by inhibiting corrosion on a whole metal surface. The study begins with the preparation stage, cutting the pipe into specimens of a certain size, smoothing the surface and weighing the initial weight. The testing phase was carried out by immersing the specimens at various times of 120 h, 240 h and 360 h with Na2CrO4 inhibitor variations concentration was 0%; 0,3%; 0,6%; and 0,9%. The corrosion rate was calculated by re-weighing the specimen after the immersion process. The results showed that the most effective inhibitor concentration was 0.6% with a corrosion rate of 0.3021 mmpy and the Remaining Service Lifetime (RSL) was 9.399 years.

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Corrosion rate of AA 7050 in 3.5% NaCl environment with sodium chromate (Na₂CrO₄) inhibitor variation

Cited by 3 publications

References 7 publications

Analisis Distribusi Tegangan pada Sambungan Las Dissimilar antara ASTM A36 Steel dan AISI 304 dengan Solidworks

Analisis Distribusi Tegangan pada Sambungan Las Dissimilar antara ASTM A36 Steel dan AISI 304 dengan Solidworks

Corrosion inhibitor system for blocking polymer well by potassium persulfate injection

The Effectiveness of Na<sub>2</sub>CrO<sub>4</sub> to Inhibit Corrosion Rate of a A106 Grade Pipe in the Furnace Circulating Cooling Water with the Weight Loss Method on Pipe Lifetime Determining

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