Dissertation > Excellent graduate degree dissertation topics show

Sulfate-reducing Bacteria Influenced Corrosion of Marine Steel and Its Control

Author: ZhaoXiaoDong
Tutor: HouBaoRong
School: Graduate School , Chinese Academy of Sciences ( Institute of Oceanography )
Course: Marine Chemistry
Keywords: Corrosion SRB EIS TEM Cathodic protection
CLC: Q939.98
Type: PhD thesis
Year: 2007
Downloads: 436
Quote: 4
Read: Download Dissertation


In this paper, sulfate-reducing bacteria (SRB) influenced corrosion of marine steel and its control in seawater and sea mud environments were studied, concerned of corrosion mechanism, occurrence and transformation process of corrosion products and the influence of cathodic protection on corrosion of steel in sea mud containing SRB.SRB was cultured and enriched originated seamud from Jiaozhou Bay, Qingdao. Desulfotomaculum was identified by molecule biology analysis and morphology of SRB was observed by fluorescence microscopy and transmission electron microscopy(TEM).The corrosion-restrained to corrosion-accelerated process of marine steel was studied in seawater and sea mud environments containing active SRB by weight-loss and galvanic corrosion methods, electrochemical impedance spectra(EIS), electronic probe microanalyzer(EPMA) and TEM, including the attachment of SRB, transformation of oxides to sulphides influenced by SRB metabolic products, and morphology and composition identification of corrosion products. Besides, formation and extension of pitting corrosion influenced by SRB from the point of view of corrosion interface between substrate and corrosion products and biomineralization of single crystalline ferric oxide cube in medium inoculated SRB were also discussed. The reliability of cathodic protection on carbon steel buried in sea mud containing SRB was evaluated with emphasis on EIS under different cathodic protection potentials. The relationship among cathodic protection potential, corrosion rate and bacteria activities was summarized by EIS results, weight-loss test and number-calculation of bacteria by most probability number(MPN) method. -950mV (CSE) or even lower potential was needed to ensure of effective protection. The growth activities and stability of SRB were low under higher cathodic protection potential.

Related Dissertations

  1. Preparation of Micro-Arc Oxidation Ceramic Coating on Mg Alloy and the Research of Galvanic Corrosion,TG174.453
  2. Study of Inhibitors of Aluminum Anode in NaCl Solution,TG174.42
  3. Anti-corrosion Property of Flake Zinc Epoxy Coating Doped with Rare Earth in SRB,TQ630.1
  4. Temperature and Pressure Drop Analysis and Its Application in CO2 Corrosion Evaluation of Subsea Pipeline,TE832
  5. Identification of Biological Characteristics with Human Keloid Fibroblast-like Mesenchymal Stem Cells,R622
  6. Study on Screening of Bacterial Quorum Sensing from Plant Extraction and Their Inhibitions on Biofilm Formation,Q93
  7. Research on Electrochemical Synthesis and Application of Conductive Polyaniline,O633.21
  8. Influence of Various PH and the Treating Time on Mechanical Property and Surface Structure of Ni-ti Orthodontic Wire,R783.5
  9. Sclerosing dentin interface morphology observation and Bonding Strength,R783.5
  10. PtRh / Pt 5 / C Catalyst Preparation, Characterization and Electrocatalytic Oxidation of Ethanol,TM911.4
  11. A Study of the Content Validity of TEM-4 Reading Comprehension,H319
  12. Electroless Ni-Pon the Bulk Nanocrystalline Ingot Iron,TQ153.1
  13. Study on the Silicone Modified Acrylic and Water-borne Anti-corrosion Coatings,TQ637
  14. Study on Corrosion Resistance and Condensation Property of Ni-P/Nano SiO2 Composite Coatings,TG174.4
  15. Study of Microbial Corrosion in Central Air-conditioning Cooling Water System,TU831.4
  16. Preparation, Characterization and Performance of the Bio-coatings on the Surface of Pure Titanium Based on Micro Arc Oxidation,R318.08
  17. 2205 Corrosion Research,TG142.71
  18. 316LN austenitic stainless steel stress corrosion cracking of welded joints,TG407
  19. Pulse Nanocomposite Coatings Preparation and Properties,TQ153
  20. NiTi shape memory alloy Laser Reactive Synthesis of porous coating,TG178
  21. Magnesium alloys and corrosion resistance of phosphating process,TG174.4

CLC: > Biological Sciences > Microbiology > Applied Microbiology > Corrosion of Microbiology
© 2012 www.DissertationTopic.Net  Mobile