scholarly journals Corrosion Behavior in Volcanic Soils: In Search of Candidate Materials for Thermoelectric Devices

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7657
Author(s):  
Carlos Berlanga-Labari ◽  
Leyre Catalán ◽  
José F. Palacio ◽  
Gurutze Pérez ◽  
David Astrain
Keyword(s):  
Corrosion Behavior ◽  
Heat Exchangers ◽  
Corrosion Damage ◽  
Galvanized Steel ◽  
Thermoelectric Devices ◽  
Viable Solution ◽  
Environment Characteristic ◽  
Aisi 316 ◽  
One Year ◽  
Continuous Power

Thermoelectric generators have emerged as an excellent solution for the energy supply of volcanic monitoring stations due to their compactness and continuous power generation. Nevertheless, in order to become a completely viable solution, it is necessary to ensure that their materials are able to resist in the acidic environment characteristic of volcanoes. Hence, the main objective of this work is to study the resistance to corrosion of six different metallic materials that are candidates for use in the heat exchangers. For this purpose, the metal probes have been buried for one year in the soil of the Teide volcano (Spain) and their corrosion behavior has been evaluated by using different techniques (OM, SEM, and XRD). The results have shown excessive corrosion damage to the copper, brass, and galvanized steel tubes. After evaluating the corrosion behavior and thermoelectric performance, AISI 304 and AISI 316 stainless steels are proposed for use as heat exchangers in thermoelectric devices in volcanic environments.

The Effect of Composition and Microstructure on Corrosion Behavior in SST of Zn-Al-Mg Galvanized Steel Sheet

2013 ◽  
Vol 442 ◽  
pp. 64-69
Author(s):  
Feng Li ◽  
Jia Shun Lv ◽  
Hong Gang Yang ◽  
Fang Zhou ◽  
Leng Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Steel Sheet ◽  
Alloy Composition ◽  
Element Distribution ◽  
Galvanized Steel ◽  
Good Corrosion Resistance ◽  
Excellent Corrosion Resistance

Z11A3M, Z6A3M, Z1.6A1.6M, Z1A1M and Z1M coating samples were prepared in HDPS by traditional continuous hot dipping method. The microstructure, element distribution and phase was analyzed by SEM, EPMA and XRD. The corrosion resistance was checked in SST. The result was, MgZn2 and eutectic could be found in all ZAM coating. The ZAM coatings showed excellent corrosion resistance in SST than GI. The corrosion resistance was 4.1 to 11 times of GI. There was no strong relativity between alloy composition and corrosion resistance due to Mg enrichment on the surface of coating. Edge-unsealed ZAM samples showed good corrosion resistance than edge-sealed sample.

scholarly journals Comparison of the Corrosion Behavior of Tank 51 Sludge-Based Glass and a Nonradioactive Homologue Glass

1996 ◽  
Vol 465 ◽  
Author(s):  
L. Nuñez ◽  
W. L. Ebert ◽  
S. F. Wolf ◽  
J. K. Bates
Keyword(s):  
Corrosion Behavior ◽  
Lower Solution ◽  
Solution Ph ◽  
Consistency Test ◽  
Glass Corrosion ◽  
Dissolution Tests ◽  
One Year ◽  
The Relationship ◽  
Solution Volume

ABSTRACTWe are characterizing the corrosion behavior of the radioactive glass that was made with sludge from Tank 51 at the Defense Waste Processing Facility (DWPF) and a nonradioactive glass having the same composition, except for the absence of radionuclides. Static dissolution tests are being conducted in a tuff groundwater solution at glass surface area/solution volume ratios (S/V) of 2000 and 20,000 m−1. These tests are being conducted to assess the relationship between the behavior of this glass in a 7-day Product Consistency Test and in long-term tests, to assess the effects of radionuclides on the glass corrosion behavior, and to measure the disposition of radionuclides that are released as the radioactive glass corrodes. The radioactive glass reacts slower than the nonradioactive glass through the longest test durations completed to date, which are 140 days for tests at 2000 m−1 and about 400 days for tests at 20,000 m−1. This is probably because radiolysis results in lower solution pH values being maintained in tests with the radioactive glass. Rate-affecting alteration phases that had formed within one year in tests with other glasses having compositions similar to the Tank 51 glass have not yet formed in tests with either glass.

Experimental Study on Corrosion of Multi-Component Thermal Fluid Thermal Recovery well Tube String

2020 ◽  
Vol 993 ◽  
pp. 1257-1264
Author(s):  
Zhen Li ◽  
Pei Qi Zhao ◽  
Cheng Hui Yang ◽  
Yin Lei Liu ◽  
Yin Chuan Ding ◽  
...  
Keyword(s):  
High Temperature ◽  
Partial Pressure ◽  
Corrosion Behavior ◽  
Corrosion Damage ◽  
Thermal Recovery ◽  
Corrosion Rates ◽  
Thermal Fluids ◽  
Service Period ◽  
Corrosion Reaction ◽  
The Stability

The thermal recovery well tube string is subjected to corrosion damage in multi-component gas aqueous solution during service period. Some severe damage such as thinning, perforation and even fracture of the pipe can have a serious impact on the stability and safety of the thermal recovery wells. In this paper, the high temperature and high pressure rotating sample reaction device is used to study the corrosion behavior of K55 casing steel and L80 tubing steel in high temperature environment of flowing multi-fluid. The results show the effects of O2 and CO2 concentration and temperature on pipe corrosion. Combining with the results of scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) analyses, we inferred the corrosion reaction process of tubes in different media and the corrosion behavior of two kinds of steel in the environment of multiple thermal fluids containing O2 and CO2 is clarified. Results show that the corrosion rates of K55 and L80 increase with the increase of O2 partial pressure and CO2 partial pressure, but the corrosion rates are positively correlated with temperature in oxygen-containing condition and negatively correlated with temperature in carbon dioxide-containing condition. The compactness of the corrosion product film has a large effect on the corrosion rate.

Evaluation of the Corrosion Rate for Acidic Bottom Plates of an Aboveground Oil Tank by the AE Method

2008 ◽  
Author(s):  
Naoya Kasai ◽  
So Soon Park ◽  
Kentaro Utatsu ◽  
Kazuyoshi Sekine ◽  
Shigeo Kitsukawa ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Polarization Resistance ◽  
Corrosion Damage ◽  
Strong Acid ◽  
Chloride Ions ◽  
Impedance Method ◽  
Test Pieces ◽  
Oil Storage ◽  
Ae Signals

An AE method is an effective technique that can inspect corrosion damage of tank bottom plates to prevent leakage accidents of oil storage tanks. However, a correlation between AE signals and the corrosion behavior for bottom plates is not fully clarified. In this study, the authors considered that the corrosion regions in bottom plates become a strong acid environment by chloride ions as shown our previous work. The correlation between the AE signals and the corrosion behavior with a potentiostat for test pieces was examined in the environment. The polarization resistance was measured with an AC impedance method using a frequency response analyzer. It was clear that the polarization resistance indicated the corrosion rate for a test pieces in the experiments. While measuring the AE signals, the corrosion rate was monitored with a test piece. As a result, the AE signal showed the good correlation with the corrosion rates of the test pieces.

scholarly journals Durability Assessment of Recycled Aggregate HVFA Concrete

2020 ◽  
Vol 10 (18) ◽  
pp. 6454
Author(s):  
Valeria Corinaldesi ◽  
Jacopo Donnini ◽  
Chiara Giosué ◽  
Alessandra Mobili ◽  
Francesca Tittarelli
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Corrosion Behavior ◽  
High Volume ◽  
Recycled Aggregate Concrete ◽  
Galvanized Steel ◽  
Recycled Aggregate ◽  
Aggregate Concrete ◽  
High Volume Fly Ash ◽  
Natural Aggregates

The possibility of producing high-volume fly ash (HVFA) recycled aggregate concrete represents an important step towards the development of sustainable building materials. In fact, there is a growing need to reduce the use of non-renewable natural resources and, at the same time, to valorize industrial by-products, such as fly ash, that would otherwise be sent to the landfill. The present experimental work investigates the physical and mechanical properties of concrete by replacing natural aggregates and cement with recycled aggregates and fly ash, respectively. First, the mechanical properties of four different mixtures have been analyzed and compared. Then, the effectiveness of recycled aggregate and fly ash on reducing carbonation and chloride penetration depth has been also evaluated. Finally, the corrosion behavior of the different concrete mixtures, reinforced with either bare or galvanized steel plates, has been evaluated. The results obtained show that high-volume fly ash (HVFA) recycled aggregate concrete can be produced without significative reduction in mechanical properties. Furthermore, the addition of high-volume fly ash and the total replacement of natural aggregates with recycled ones did not modify the corrosion behavior of embedded bare and galvanized steel reinforcement.

Atmospheric corrosion behavior of paint systems applied on weathered hot-dip galvanized steel

2002 ◽  
Vol 74 (12) ◽  
pp. 59-68 ◽  
Author(s):  
D. Fuente ◽  
M. Morcillo ◽  
J. Simancas ◽  
L. S. Hernández ◽  
J. L. Ruiz
Keyword(s):  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Galvanized Steel ◽  
Paint Systems
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