• Understanding Corrosion Resistant TMT Bars: A Key to Extending the Life of TMT Steel Bars

    April 9, 2024 | By Kenza TMT Steel Bars


    In the world of construction, the materials you choose play an important role in the longevity and resilience of a structure. TMT bars (Thermo-Mechanically Treated) bars are one of the most crucial components used for this. The difference between normal steel reinforcement bars and TMT bars is that they have several advantages. Let us explore them to understand the indispensable role that corrosion-resistant TMT Bars play in construction. We will also look into how you can determine the corrosion resistance of TMT bars. 


    Advantages of Using Rusting-Free TMT Bars

    Strength and stability

    TMT bars are specially designed steel bars that are known for their strength and durability. They provide long-lasting protection for the structure and ensure protection from damage

    High Ductility

    TMT bars are more ductile compared to normal steel bars, making them the perfect choice for earthquake-resistant structures

    High-temperature Resistivity

    The strength and durability of TMT bars also contribute towards their resistance to high temperatures and extreme temperature changes. This is because the size of TMT bars does not increase or decrease when temperature changes.


    While comparing them to traditional steel bars, TMT Steel bars are highly cost-effective. Primarily because they are required in fewer numbers because of their strength. Their high durability also means that you may not need to spend time and money more on maintenance and repair, making them cost-effective in the long run.

    Corrosion Resistance

    TMT Bars are manufactured in such a way that they are corrosion-resistant. They are highly protected against environmental factors like weather, humidity, salt and water.


    How to test corrosion resistance

    The quality of a TMT bar relies heavily on its corrosion resistance abilities. Especially when they are being used in areas that are prone to corrosion like coastal regions where the bars will be exposed to salt and water. Many tests can be used to evaluate how resistant a TMT Steel Bar is to corrosion.

    Salt Spray Test (SST) or Salt Fog Test

    It is one of the most commonly used corrosion tests. In this simple test, TMT steel bars are exposed to saline environments for a particular period of time and see how they resist corrosion. The durability of the bars is determined by meticulously assessing how and when corrosion or rust occurs.

    Electrochemical Testing

    This is a more scientific and accurate method of corrosion testing. Unlike the Salt Fog Test, this method makes use of electrochemical methods to get a precise evaluation of corrosion resistance. Potentiodynamic Polarisation and Electrochemical Impedance Spectroscopy (EIS) are two commonly used electrochemical methods for corrosion testing.

    Corrosion Potential Measurement

    In this method, the TMT bars are set up as a working electrode in an electrochemical cell. It is then exposed to a corrosive environment. The voltage difference between the bar and the reference electrode is marked. This helps in assessing the corrosion resistance of said TMT bar. Usually, this method is combined with other techniques to carry out elaborate tests and gain a comprehensive understanding of the corrosion mechanisms affecting the TMT steel bars.

    Weight Loss Test 

    This is a simple test in which the TMT bar samples are exposed to a certain corrosive environment for a specified period of time and then measured for weight loss. 

    Also, read How TMT Steel Bars Shield Buildings from Natural Calamities 

    Tips to Avoid Corrosion

    The first and foremost thing one needs to do to make sure that they get the best out of TMT Steel bars is to make sure that they consult with a construction professional. It can be an engineer, architect or someone reputable connected to the field. They will be able to suggest the best TMT Steel Bar company based on your requirements. Here are some pragmatic steps you can additionally take to prevent corrosion in your TMT Steel Bars.

    Choosing High-Quality TMT Bars

    The first step is of course to choose the TMT Bars. While selecting your brand, opt for ones that are from reputable manufacturers that have been known to produce high-quality corrosion-resistant materials.

    Ensuring Proper Storage

    TMT bars need to be stored in a dry and well-ventilated area if you want to prevent corrosion. Additionally, minimising their exposure to moisture and humidity is also crucial as they are the primary factors that contribute to rusting. Without proper storage, the integrity of your TMT bars will be compromised even before they have been used.

    Avoid Abrasion

    There is a high chance that TMT Steel bars can be subjected to abrasions during transportation or installations. Minimising these will help prevent damage to protective layers.

    Regular Maintenance

    To ensure the long life of TMT Steel Bars, regular checkups and maintenance are required. This helps you detect signs of corrosion and get ahead of it before it escalates and causes irreversible damage. Cleaning outer surfaces regularly and applying protective coatings can also help extend their lifespan and prevent corrosion to a certain extent. If you ask how often TMT maintenance should be done, it depends upon the quality of materials and their environment.

    Controlled Environment

    Corrosion is primarily caused due to external factors like moisture, humidity, salinity etc. Creating controlled rooms where these factors are at optimal levels constantly can minimise the risk of rusting. 

    Prevent Contact with Water

    Using waterproof materials to avoid contact with water or moisture is yet another way to reduce corrosion. This can be seen as a proactive approach which makes a huge difference when it comes to fighting corrosion. 

    Using Corrosion Inhibitors

    You can also make sure to use Corrosion-resistant steel TMT bars that are specifically designed to withstand harsh weather conditions in areas prone to corrosion. 


    The longevity of TMT Steel Bars is heavily dependent on its quality and environmental factors. While sourcing TMT steel bars from reputed manufacturers is paramount, it is not enough to ensure that your TMT bars are used to their maximum potential. They need to undergo periodic maintenance and checkups. Adopting steps to avoid corrosion can go a long way in ensuring the structural integrity and safety of the structures.



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