Namurata Sathirachinda Pålsson

National Science and Technology Development Agency

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Wanida Pongsaksawad

National Science and Technology Development Agency

Piya Khamsuk

National Science and Technology Development Agency

Sikharin Sorachot

National Science and Technology Development Agency

Ekkarut Viyanit

National Science and Technology Development Agency

Pitichon Klomjit

Thailand National Metal and Materials Technology Center

Kosit Wongpinkaew

National Science and Technology Development Agency

Siwat Linjee

National Science and Technology Development Agency

Chaiyasit Banjongprasert

Chiang Mai University

Suphitcha Moonngam

Chiang Mai University

Aphichart Rodchanarowan

Kasetsart University

Cooperative Institutions

National Science and Technology Development Agency

Thailand National Metal and Materials Technology Center

Chiang Mai University

Chulalongkorn University

Kasetsart University

Pathumthani University

King Mongkut's University of Technology North Bangkok

JFE Holdings (Japan)

Massachusetts Institute of Technology

Keihin (Japan)

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Characterization of Rust Formed on Structural Carbon and Weathering Steels Exposed to Tropical Climate of Thailand

CORROSION (2019)

Pitichon Klomjit Matsataka Omoda Daisuke Mizuno Nobuyuki Ishikawa Namurata Sathirachinda Pålsson

Structural carbon steel (CS) and weathering steel (WS) were exposed to various atmospheric climates of Thailand for one year. After the exposure, the samples were cleaned and corrosion losses were ...

Weathering steel

Tropical marine climate

Carbon fibers

Characterization

Rust (programming language)

Carbon steel

Tropical climate

10.5006/3139

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Citations (18)

Atmospheric Corrosion Monitoring Sensor in Corrosion Rate Prediction of Carbon and Weathering Steels in Thailand

MATERIALS TRANSACTIONS (2020)

Wanida Pongsaksawad Namurata Sathirachinda Pålsson Piya Khamsuk Sikharin Sorachot Amnuaysak Chianpairot

Galvanic type atmospheric corrosion monitoring (ACM) sensors can distinguish wet and dry conditions of a surface by reporting spiked charge when there is an electrolyte film on the sensor. In this study, Fe–Ag type ACM sensor was exposed to monitor time of wetness (TOWACM) on carbon steel and weathering steel coupons at seven test stations in Thailand. Climate parameters were monitored by weather stations. Chloride and sulfur dioxide deposition rates were obtained by dry gauze and lead dioxide cylinder methods, respectively. The objective was to investigate the effects of TOWACM, climate, and aerosols on corrosion rate in Thailand tropical climate under high temperature, high relative humidity, and frequent monsoon-induced rainfalls. Multivariable linear regression model applied on the first-year corrosion rate yielded predictive equations for (1) inland areas-as a function of temperature (T) and relative humidity (RH) and (2) coastal areas-as a function of rainfall (RF) with TOWACM or chloride (Cl−) deposition rate. The first corrosion map of Thailand was proposed based on the predictive equations for corrosion rates of carbon steel and weathering steel.

Weathering steel

Carbon steel

Deposition

Dry season

10.2320/matertrans.mt-m2020230

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Citations (12)

Chloride distribution model and corrosion map of structural steels for tropical climate in Thailand

The Science of The Total Environment (2021)

Wanida Pongsaksawad Pitichon Klomjit Piya Khamsuk Sikharin Sorachot Namurata Sathirachinda Pålsson

Tropical climate

10.1016/j.scitotenv.2021.147465

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Citations (17)

Effect of liquid magnesium on high temperature failure of heat resistant alloy

Engineering Failure Analysis (2017)

Namurata Sathirachinda Pålsson Nirut Bunchoo Witthawat Wongpisan Sinthu Chanthapan

Penetration (warfare)

10.1016/j.engfailanal.2017.03.021

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Citations (2)

Microstructure and electrochemical study of equal channel angular pressed Al-Zn alloys

Journal of Physics Conference Series (2019)

Phakkhanan Khamnantha Siwat Linjee Namurata Sathirachinda Pålsson Chaiyasit Banjongprasert

Abstract This research focuses on the effect of severe plastic deformation (SPD) on microstructure and properties of Al and Al-Zn (in 1, 2, 3, 4, 5 wt%) anodes of Al-air battery. The Al-Zn alloys with a diameter of 12.5 mm and 62.5 mm long were pressed in an ECAP die (press angle $=90°, X P=20°), using route Bc with 2, 4, 6, 8 passes at room temperature. Microstructural characterization was carried out using scanning electron microscope (SEM). The cast samples were solutionized at 450 °C for 1 hr after pressing. Grain size of the as-ECAP samples decreased with an increase of ECAP passes. The smaller grain size resulted in strengthening of Al-Zn. An decrease in grain size was due to significant change in the microstructure from an intensive shear stress after ECAP. Polarization test in a 3.5wt% NaCl solution were used to study electrochemical behaviours of the as-cast and ECAP Al-Zn alloys. The conclusion from the research will be used as a platform to develop Al anodes for Al-air battery in the future.

Severe Plastic Deformation

10.1088/1742-6596/1380/1/012147

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Citations (3)

Influence of soil conditions on corrosion behavior of buried coated and uncoated carbon steels

Shahrukh Shoaib Thongchai Rohitatisha Srinophakun Namurata Sathirachinda Pålsson

This paper presents an experimental investigation on influence of soil conditions on initial corrosion behavior of buried uncoated and coated steels at room temperature. Moisture contents and sodium chloride were varied in soil. The techniques used are electrochemical measurements i.e. open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization. The experimental results show that corrosion rate increases up to critical moisture content of 60 wt.% for each soil sample containing 0-10 wt.% sodium chloride. Maximum corrosion rate observed for carbon steel is 1.03 mm/yr for coupled action of 60 wt.% moisture and 5 wt.% sodium chloride. Corrosion rates of zinc-electroplated, and copper-electroplated samples are 0.45 and 0.057 mm/yr, respectively, under the same testing condition.

Carbon steel

Open-circuit voltage

10.1109/icird.2018.8376310

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Citations (5)

Fatigue Failure of Hydrocarbon Piping System

Journal of Failure Analysis and Prevention (2017)

Namurata Sathirachinda Pålsson Siam Kaewkumsai Kosit Wongpinkaew W. Khonraeng

Work hardening

Service life

Hot work

10.1007/s11668-017-0339-7

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Citations (4)

Accelerated Corrosion Test Based on ISO 16539 for Life Prediction of Carbon Steel in Tropical Coastal Areas

CORROSION (2023)

Wanida Pongsaksawad Benjawan Moonsri Sikharin Sorachot Pranpreeya Wangjina Piya Khamsuk

The developments of accelerated corrosion tests have been focused on the cyclic corrosion test with an improved correlation with the field corrosion behavior. This study applied ISO 16539 to simulate the tropical coastal environment in Thailand. ISO 16539 method B with 0.1 g-salt/m2 correlated well with Rayong (C2) exposure data. A method for calculating salt deposition and testing period was derived by interpolation and extrapolation of the simulated test results that were calibrated with the field-test database for Rayong (C2) and Phangnga (C4), Thailand. This work enables the application of ISO 16539 in life prediction for carbon steel exposed to the tropical coastal climate with sulfur dioxide deposition rate less than 13 (mg/m2/d: mmd) and chloride ion deposition rates greater than 10 mmd.

Deposition

Carbon steel

10.5006/4130

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Citations (1)

Outdoor atmospheric corrosion of carbon steel and weathering steel exposed to the tropical‐coastal climate of Thailand

Materials and Corrosion (2019)

Namurata Sathirachinda Pålsson Kosit Wongpinkaew Piya Khamsuk Sikharin Sorachot Wanida Pongsaksawad

Abstract This study focuses on atmospheric corrosion of carbon steel and weathering steel exposed at two different locations with dissimilar meteorological parameters and airborne pollutants in Thailand. The samples are subjected to an outdoor atmosphere for up to 36 months at Rayong, close to the Gulf of Thailand, and Phangnga, near the Andaman Sea. Thickness loss (µm), corrosion rate (µm/year) together with corrosion product morphology and composition are systematically analyzed using X‐ray diffraction and a scanning electron microscope. Corrosion resistance of the tested steels exposed at both locations is discussed based on the above‐mentioned parameters and calculated corrosion kinetics. The results indicate that the total time of wetness, amount of rainfall and chloride deposition rate play an important role in corrosion behavior of the tested steels. Alloying elements, copper, chromium and nickel, are shown to improve corrosion resistance of the samples when exposed at the location with a higher chloride concentration.

Weathering steel

Rust (programming language)

Carbon steel

Deposition

Carbon fibers

10.1002/maco.201911340

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Citations (33)

Corrosion behavior of zinc and copper coated structural steels in soil environments

Materialwissenschaft und Werkstofftechnik (2022)

Namurata Sathirachinda Pålsson Piya Khamsuk Sikharin Sorachot Kosit Wongpinkaew Wanwisa Thaiwirot

Abstract Corrosion behavior of structural carbon steels grade SS400 coated with copper and zinc exposed to soil sample extracted from the central part of Thailand is studied using weight loss analyses and electrochemical methods, including open circuit potential monitoring for 3600 seconds, electrochemical impedance spectroscopic analyses and potentiodynamic polarization measurements. Bare carbon steels are also examined as a reference. Open circuit potential and polarization resistance of all samples are measured on (1, 2, 3, 4, 7, 10, 15, 30, 45, 60, 77 and 91) days of exposure. Corrosion potential is monitored only on the first and last days. After 91 days, corrosion rate in millimeter per year is calculated from weight loss and corrosion product is characterized. Effects of coating material, thickness and process on corrosion resistance of carbon steel subjected to soil environment are reported and discussed.

Carbon steel

Open-circuit voltage

10.1002/mawe.202100145

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Citations (3)