Correlation Studies between Outdoor Exposure and Accelerated Laboratory Corrosion Tests for Galvanic and Non-Galvanic Ceramic-Aluminum Couples

Purpose The purpose of this paper is to study the influence of temperature on the acceleration and simulation of indoor corrosion tests and the corrosion behavior of Q235 carbon steel. Design/methodology/approach The indoor corrosion test was carried out by continuous salt spray in a salt spray chamber. Weight loss analysis, X-ray diffraction, cannon 1500 D, scanning electron microscopy and electrochemical techniques are used to analyze the results. Findings It was found that thickness loss of Q235 carbon steel increases with higher temperature and it can reach 0.095 mm at 50°C. Compared with the Xisha exposure test, the acceleration rate can achieve 230 times. This phenomenon indicates that decreasing the experimental temperature is beneficial to the anti-corrosion of the Q235 carbon steel. It is fascinating to find that acceleration and simulation increase with temperature simultaneously, which shows that β-FeOOH promotes the corrosion rate and α-FeOOH provides high simulation. Meanwhile, electrochemical impedance spectroscopy indicates that the resistance of the rust layer improves with temperature. Practical implications Through the study, the authors found that with the increase of temperature, the acceleration and simulation of indoor corrosion test improved, corrosion products and kinetics are the same as those in outdoor exposure test, and which means that the laboratory can achieve the long-term corrosion degree of outdoor exposure in a short time, and the similarity with outdoor exposure is high. This helps to the study of marine atmospheric corrosion, and indoor accelerated corrosion tests can largely eliminate regional differences by adjusting some environmental factors, and lay a foundation for marine atmospheric corrosion. Originality/value The effects of temperature on the acceleration and simulation of indoor corrosion tests are discussed. Through laboratory experiments, the long-term service life of Q235 carbon in the Xisha marine atmosphere can be predicted effectively.

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Corrosion of metals and alloys. Determination of bimetallic corrosion in outdoor exposure corrosion tests

10.3403/00485081u ◽

2015 ◽

Keyword(s):

Outdoor Exposure ◽

Metals And Alloys ◽

Corrosion Tests ◽

Bimetallic Corrosion

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Angular correlation studies in Cr

Nuclear Physics A ◽

10.1016/s0375-9474(68)93056-x ◽

1968 ◽

Vol 111 (1) ◽

pp. 657-677

Author(s):

J MO ◽

C LEWIS ◽

M THOMAS ◽

P TWIN

Keyword(s):

Angular Correlation ◽

Correlation Studies

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Correlation Studies on Grain Yield and its Component Traits in Rice (Oryza sativa L.)

International Journal of Scientific Research ◽

10.15373/22778179/nov2013/5 ◽

2012 ◽

Vol 2 (11) ◽

pp. 13-14

Author(s):

R. ARULMOZHI R. ARULMOZHI ◽

◽

Dr. A. MUTHUSWAMY Dr. A. MUTHUSWAMY

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Oryza Sativa L ◽

Correlation Studies ◽

Component Traits

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Mcc Corrosion Tests at Reference Testing Conditions for A27 Cast steel in Hanford Ground Water

MRS Proceedings ◽

10.1557/proc-84-215 ◽

1986 ◽

Vol 84 ◽

Author(s):

M.D. Merz ◽

F. Gerber ◽

R. Wang

Keyword(s):

Pacific Northwest ◽

Pressure Vessel ◽

Static Pressure ◽

Cast Steel ◽

Statistical Treatment ◽

Testing Conditions ◽

Corrosion Tests ◽

Corrosion Rates ◽

High Level Nuclear Waste ◽

High Level

AbstractThe Materials Characterization Center (MCC) at Pacific Northwest Lab- oratory is performing three kinds of corrosion tests for the Basalt Waste Isolation Project (BWIP) to establish the interlaboratory reproducibility and uncertainty of corrosion rates of container materials for high-level nuclear waste. The three types of corrosion tests were selected to address two distinct conditions that are expected in a repository constructed in basalt. An air/steam test is designed to address corrosion during the operational period and static pressure vessel and flowby tests are designed to address corrosion under conditions that bound the condi ring the post-closure period of the repository.The results of tests at reference testing conditions, which were defined to facilitate interlaboratory comparison of data, are presented. Data are reported for the BWIP/MCC-105.5 Air/Steam Test, BWIP/MCC-105.1 Static Pressure Vessel, and BWIP/MC-105.4 Flowby Test. In those cases where data are available from a second laboratory, a statistical analysis of interlaboratory results is reported and expected confidence intervals for mean corrosion rates are given. Other statistical treatment of data include analyses of the effects of vessel-to-vessel variations, test capsule variations for the flowby test, and oven-to-oven variations for air/steam tests.

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