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RESIDUAL STRENGTH OF STEEL COUPONS AND PLATES SUBJECTED TO CORROSION DAMAGE

Pawar, Umang
http://rave.ohiolink.edu/etdc/view?acc_num=akron1525469612315028

Abstract Details

2018, Master of Science in Engineering, University of Akron, Civil Engineering.
Structural steel is widely popular in the construction, energy and transportation industry. The unique properties of structural steel come from the chemical composition and the manufacturing process of the steel. The material properties of the steel can be altered by adding small quantities of other elements during the manufacturing process. High strength low alloy steel is often used in the construction of the naval vessels. The high strength low alloy steel (HSLA) provide better mechanical properties and greater resistance to the corrosion damage. The carbon content in the high strength steel is 0.05-0.25%. Other elements like copper, silicon, chromium, and phosphorus are added in small quantities for improving the strength and corrosion resistance. Despite having the high corrosion resistance, the sea environment with high humidity and saline water is a favorable condition for the corrosion process. The damage assessment due to corrosion in naval vessels is critical for the maintenance and safety. The damage transpired by the corrosion is a complex phenomenon. It depends on the extent of corrosion, nature of corrosion and the location of the corrosion. The corrosion can be broadly classified into uniform corrosion, pitting corrosion, groove corrosion and galvanic corrosion. The various nature of the corrosion affects the residual strength of the steel structure in different ways. Visual inspection is a common method for corrosion damage inspection. Visual inspection does not take account of structural analysis and failure studies. Corroded parts of the naval vessels are often replaced before any significant loss of the strength. Replacing corroded part is an expensive and time-consuming exercise. Delay in the repair of the damaged part can cause series safety concerns. This assignment was conducted to study the residual strength in the steel coupons and plates subjected to the accelerated corrosion damage. In this assignment, residual strength of ASTM A-572 steel coupons and steel plates were established for tensile and compressive buckling loading condition. The effect of uniform corrosion and the pitting corrosion were studied. Study on the steel stiffened panels subjected to corrosion damage is presented in the doctorate thesis of Mr. Srikanth Bajaj. The main aim of this study is to derive a relationship between the corrosion damage and the loss of the strength in the steel structural member. In order to achieve the artificial corrosion damage electrochemical corrosion process, Q-Fog chamber and CNC machine were used. ASTM A572 grade 60 structural steel was used for the experimental testing. To verify the experimental results, finite element analysis (FEA) was conducted on the equivalent test samples. FEA software Abaqus was used to conduct the finite element analysis. Corroded and non-corroded test specimens were tested for tensile test and compressive buckling test. The results acquired from the experiment, FEA model and analytical calculations were analyzed and compared. The residual strength in the steel coupons and plates due to corrosion damage is studied. The relation between percentage corrosion and the strength loss is obtained based on the experimental, FEA and analytical results.
Anil Patnaik, Dr (Advisor)
Srivatsan T, Dr (Committee Member)
Zhe Luo, Dr (Committee Member)
123 p.
Civil Engineering
Steel corrosion, Navy Ship, Electrochemical Corrosion, Residual strength

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Citations

  • Pawar, U. (2018). RESIDUAL STRENGTH OF STEEL COUPONS AND PLATES SUBJECTED TO CORROSION DAMAGE [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525469612315028

    APA Style (7th edition)

  • Pawar, Umang. RESIDUAL STRENGTH OF STEEL COUPONS AND PLATES SUBJECTED TO CORROSION DAMAGE. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1525469612315028.

    MLA Style (8th edition)

  • Pawar, Umang. "RESIDUAL STRENGTH OF STEEL COUPONS AND PLATES SUBJECTED TO CORROSION DAMAGE." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525469612315028

    Chicago Manual of Style (17th edition)

akron1525469612315028
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This open access ETD is published by University of Akron and OhioLINK.