Djamel Aouali Explains How Natural Waters Affect the Behaviour of Austenitic Stainless Steels – Village De L’emploi

Austenitic stainless steel is a type of stainless steel alloy which is known for its excellent corrosion resistance, high-temperature strength, and oxidation resistance. This makes it popular in many industrial and commercial applications, including petrochemical, food processing, and medical equipment.

But what happens when stainless steel is exposed to natural waters? What effect does it have on its behaviour? Djamel Aouali, an expert on metallurgy and corrosion, has the answers. In this blog post, he dives into the influence of natural waters on the behaviour of austenitic stainless steels.

The Impact of Natural Waters on the Electrochemical Properties of Materials

According to Dr Djamel AOUALI, now HRD DCARTE Engineering, the presence of dissolved ions, bacteria, and suspended particles in natural waters may have a considerable influence on the electrochemical behaviour of materials. These elements have the potential to influence the electronic characteristics of materials and trigger electrochemical processes, both of which may impact the materials’ electrochemical reactivity.

Corrosion is one of the most significant impacts of natural waters on the electrochemical behaviour of materials. Ions that have been dissolved in water set off electrochemical processes, which result in the formation of oxides on the surface. These oxides may cause structural damage. Natural waters may also include microorganisms that contribute to corrosion since these organisms produce acids and enzymes capable of breaking down metals.

Similarly, natural waters have the potential to influence the electrical characteristics of materials, which in turn may alter the electrochemical activity. One illustration of this would be the impact that particles in suspension may have after they have reached the surface of a material, namely on the electrical conductivity of that substance. Metabolites produced by microorganisms have been shown to alter the conductivity of several materials.

In conclusion, exposure to natural waters can have a significant influence on the electrochemical behaviour of an item in a number of different ways. Corrosion and other changes to an object’s electrical characteristics are only two of the ways in which this might occur. Materials such as the austenitic stainless steels that are often used in the industry need to be designed and implemented with these considerations in mind so that they can withstand the effects of being exposed to natural waters.

Corrosion mechanisms and prevention methods are the focus of the research of experts like Djamel Aouali, who examine the dynamics between materials and natural waters. The effects of natural water on materials are studied using methods including submerging test pieces in water, electrochemically measuring the free corrosion potential, and simulating stress corrosion. The findings of this research have the potential to be put to use in the extension of the useful life of materials and the reduction of the number of times that machinery has to undergo maintenance or repairs.

An Overview of Djamel Aouali’s Thesis

Djamel Aouali’s thesis topic is the influence of natural waters on the electrochemical, acoustic, and mechanical properties of austenitic stainless steel. The waters of the Oise River served as the research setting for this investigation.

Study of the Impact of Oise Water on the Free Corrosion Potential

As part of this experiment, a portico was constructed so that test articles could be submerged in the water of the Oise River in a controlled manner while the free potential of the corrosion could be monitored. An examination of the biofilm using a microscope revealed that diatoms were the most common kind of microbial dweller inside the biofilm. The findings pointed to an increased potential for free corrosion as well as the appearance of a new oxidant in the form of hydrogen peroxide (H₂O₂).

Djamel Aouali

Study of Stress Corrosion of Austenitic Stainless Steels

For the purpose of simulating corrosion under stress, a slow traction machine was used, and real-time tracking of acoustic emission and free corrosion potential was performed. The findings of the experiment demonstrated that austenitic stainless steels under stress had a low sensitivity to biofilm-linked corrosion. On the other hand, the presence or absence of a biofilm has been connected to reversible changes in potential. These potential shifts may be traced back to the activity of the biofilm itself as it goes through the process of deformation.

Conclusion of the Thesis

According to the findings of this thesis, the performance of austenitic stainless steels might be impacted by the presence of natural waters. It was discovered that the free corrosion potential was heightened in the presence of biofilm, and at the same time, a new oxidant started to develop. In applications similar to those seen in the real world, it has been shown that austenitic stainless steels are resistant to the stress corrosion generated by biofilms.

What This Means for the Industries

These results have a significant impact in the practical world, in particular for applications in which austenitic stainless steels are put in contact with natural waters. It is essential that these outcomes be taken into consideration throughout the design and usage of these materials in order to avoid corrosion and provide a long service life for structures and equipment that are exposed to natural waters. It is vital that more studies be conducted on the impacts of microorganisms present in natural waters on materials to unravel the processes of corrosion and develop efficient preventive measures,


It is important to note that the analysis presented in Djamel Aoualis thesis, which investigates the impacts of natural waters on austenitic stainless steels, is crucial since it sheds light on the materials’ behaviour when they are used in real-world situations. The results of this study indicate that the free corrosion potential of austenitic stainless steels can be significantly impacted by natural waters, especially in the presence of biofilm. According to the study’s findings, austenitic stainless steels do not experience substantial levels of corrective corrosion under test conditions.

The implications of these discoveries for the industry are significant, particularly for applications in which austenitic stainless steels are in contact with natural waters. The results of this study might be put to use by companies to improve the design and use of the materials in question, prolonging the materials’ usable lives and reducing the costs associated with corrosion. Further study into the effects of microorganisms present in natural waters on materials must be pursued to get a deeper comprehension of the processes involved in corrosion and the remedies available for it.

Lastly, Djamel Aouali‘s thesis exemplifies the excellent quality of work that may be produced by academics working in a university setting. This kind of study helps us better understand the science of materials and develop cutting-edge technologies for a wide range of manufacturing applications. The study’s findings also pave the way for productive partnerships between academics and companies in the quest to learn more about materials and how they behave in the natural world.

20 réflexions sur “<strong>Djamel Aouali Explains How Natural Waters Affect the Behaviour of Austenitic Stainless Steels – Village De L’emploi</strong>”

  1. The findings of Djamel Aouali’s research shed light on the behavior of austenitic stainless steels in real-world situations. This knowledge is vital for designing reliable structures and ensuring long service life in applications exposed to natural waters

  2. Djamel Aouali’s study on the electrochemical properties of stainless steels in natural waters demonstrates the value of academic research in advancing material science. This research has the potential to foster collaborations between academia and industry for further advancements

  3. The article briefly touches on the preventive measures against corrosion, but it would be valuable to provide more information on effective strategies and techniques for industries. Practical guidance would assist in mitigating the risks associated with natural waters

  4. It would be valuable to understand how Djamel Aouali’s findings can be practically applied in terms of developing preventive measures and improving corrosion resistance. More practical implications would make the research more actionable for industries

  5. Djamel Aouali’s research serves as a reminder of the significance of studying the behavior of materials in real-world conditions. This knowledge allows for the design of structures and equipment that can withstand the challenges posed by natural waters

  6. The article briefly mentions the impact of microorganisms in natural waters, but it would be beneficial to delve deeper into their role and the specific types of microorganisms that contribute to corrosion. More information would enhance the understanding of this issue

  7. The meticulous research conducted by Djamel Aouali provides practical solutions for industries working with austenitic stainless steels in contact with natural waters. These findings can significantly contribute to reducing corrosion-related costs and improving equipment performance

  8. Djamel Aouali’s thesis presents valuable insights into the behavior of stainless steels in the presence of natural waters. This knowledge can help industries optimize material selection and develop preventive measures against corrosion

  9. The article mentions the potential impact of natural waters on stainless steels, but it would be useful to discuss the magnitude of this effect. Understanding the extent of the influence would help industries gauge the significance of preventive measures

  10. While Djamel Aouali’s research focuses on the electrochemical behavior of stainless steels, it would be interesting to explore the mechanical properties and structural integrity in the context of exposure to natural waters. A more comprehensive analysis would be beneficial.

  11. Djamel Aouali’s thesis sounds promising, but it would be helpful to include more specific examples of the methods used in the research. This would provide readers with a clearer understanding of the experimental procedures and their reliability

  12. The research conducted by Djamel Aouali highlights the need to consider the presence of biofilm and its impact on the corrosion potential of stainless steels. These findings are valuable for industries seeking to enhance the durability of their equipment

  13. The article highlights the importance of Djamel Aouali’s research for industries, but it would be beneficial to mention specific examples of sectors that would benefit the most from his findings. This would provide more context for the readers

  14. Djamel Aouali’s research on the influence of natural waters on stainless steels provides valuable insights for various industries. Understanding the electrochemical behavior can help enhance the durability and longevity of materials

  15. Although Djamel Aouali’s research is valuable, it would be interesting to explore the potential applications of his findings beyond austenitic stainless steels. Examining other types of materials would broaden the scope and impact of the research

  16. While Djamel Aouali’s research provides valuable insights, it would be helpful to have more specific recommendations for industries dealing with stainless steels in natural water environments. Practical guidelines would assist in implementing preventive measures effectively

  17. Djamel Aouali’s exploration of the impact of natural waters on materials is crucial for industries relying on stainless steel. By understanding corrosion mechanisms, companies can design structures and equipment that withstand the challenges posed by natural water environments

  18. It’s impressive to see the comprehensive study conducted by Djamel Aouali on the electrochemical, acoustic, and mechanical properties of austenitic stainless steel. This research can contribute to advancements in corrosion prevention and maintenance practices

  19. While Djamel Aouali’s research is commendable, the article lacks information on the limitations and challenges encountered during the study. Including these details would provide a more comprehensive view of the research’s implications

  20. Djamel Aouali’s work highlights the importance of considering the influence of natural waters on the corrosion potential of stainless steels. Such insights can guide industries in implementing preventive measures and optimizing the use of materials

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