DEVELOPMENT OF CR-NI NANO HYBRID COATING FOR CORROSION RESISTANCE AND SURFACE PROPERTIES IMPROVEMENT ON MILD STEEL

1.1 Background of Study

1.2 Statement of Problem

1.3 Aim and Objectives 

1.4 Scope of Study

1.5 Justification

Consequences of Corrosion 

Concept of Nano Technology

Elecctrode position Method

Properties of Nickel & Chromium

3.1 Materials

3.2 Methods

3.2.1 Material Preparation

3.2.2 Design of Experiment

3.2.3 Determination of Weight of Individual Compound

3.2.4 Synthesis and Deposition of Nano Hybrid Film on Mild Steel

3.2.5 Corrosion Tests

3.2.6 Characterization Studies

4.1 Results

4.2 Discussion

5.1 Conclusion

5.2 Recommendations

REFERENCES

Fig 3.2     Electrochemical Deposition Setup

Mild steel is one of the engineering alloys that are utilized in many industrial applications (El-Etre, 2007). Its usefulness is traced to its availability, moderate strength and cost effectiveness (Finsgar and Jackson, 2014). However, it is susceptible to corrosion in aggressive environment (Chima, 2021).  The challenges associated with corrosion process in the use of mild steel in industrial processes have led to material deterioration and subsequently materials failure or that of the entire engineering system. Most often, the industrial process is always shut down for proper maintenance at high cost (Singh et al., 2012). Hence, the need to develop means to mitigate or control corrosion process on mild steel becomes imperative. A lot of scientific research approaches have been given to the problem of corrosion on metals (Raja and Sethuraman, 2009; Shyamala and Arulanantham, 2009). Raja and Sethuraman, (2009b) reported that the use of corrosion inhibition coating is the most available cost effective for controlling corrosion. The use of appropriate corrosion inhibitor allows the use of low grade carbon steel, which significantly reduces the capital cost of engineering project when compared to the use of high grade alloys in the same project. (Quraishi, 1999).

It has been observed that most of the corrosion inhibition coatings used in the previous time have only played a single role of reduction of corrosion rate without improving on the surface properties of mild steel. Hence, there is need to develop a corrosion inhibiting coating which could control the corrosion and as well enhance the properties of the material. This will solve dual purposes in industrial process which will definitely widen the application of mild steel for several other engineering applications. 

Hence, this research study sought to coat Cr-Ni nano hybrid film on mild steel for corrosion inhibition and for enhancement of the surface properties using electro deposition methodand determine the effect of the volume formulations with coating time on the corrosion behaiour of the mild steel..  This is intended to offer great potential for various applications due to the superior characteristics that are not typically found in conventional coatings. 

Despite the wide industrial applications of mild steel as a good engineering alloy, it has been reported to be susceptible to corrosion in aggressive environment. That is why many scientific approaches have been adopted to mitigate corrosion which surface coating is one of them. Most of the nano particle coatings used in corrosion inhibition in the previous time have only single element which limited the performance of the product. Hence, there is need to develop nano film coating for mitigation of corrosion in mild steel using a hybrid coating with optimum performance. This will solve which will definitely widens the application of mild steel for several other engineering applications mostly in severe corrosion environment.

The aim of this proposed study is to explore the potentials of electro-deposit chromium-nickel nano hybrid coating on mild steel for corrosion inhibition. Also to study the effect of process parameters on the corrosion inhibition efficiency of Ni-Cr nano hybrid coating film in mild steel. The specific objectives include;

This research work is seeking to develop of Ni-Cr nano-hybrid film needed to coat mild steel using electro-deposition method for corrosion resistance. The study is also focused determining the effect of process parameters on the corrosion behavior using characterization techniques. All analysis was done with respect to the object stated in  the objective at Nano and crystal laboratory, University of Nigeria, Nsukka, Enugu State.

The application of Cr-Ni nano hybrid coating on mild steel will enable effective control of corrosion on mild steel is useful in engineering applications especially in oil and gas industries where they are utilized for transportation of liquid and gaseous petroleum products from production unit to their respective end users. This will certainly eliminate failure of pipe line vessels due to sever corrosion attack and as well reduce maintenance cost of oil and gas pipe lines. Hence, a visible positive impact of this study will be observed in the oil and gas industries where huge resources utilized to combat corrosion problem will now be conserved for other useful projects, thereby improving the nation’s economy.