KINETIC STUDIES OF SELECTED CORROSION INHIBITORS OF ALUMINIUM AND MILD STEEL IN ACID MEDIUM
- Project Research
- 1-5 Chapters
- Abstract : Available
- Table of Content: Available
- Reference Style: APA
- Recommended for : Student Researchers
- NGN 5000
Abstract
The corrosion inhibition of aluminium and mild steel in H2SO4 in the presence of Bromothymol blue, BTB, Dimethyl yellow, DMY, Methyl orange, MO, Titanium (IV) oxide, TO and Cassia Siamea Lam, CSL leaves extract at 303 – 313K was studied using “Absorbance difference” technique. The results showed that inhibition efficiency (%IE) increased with increase in inhibitor concentration (except for BTB, where beyond a “critical” concentration of 0.0007M, it reversed its function and became an accelerator) and decreased with increase in temperature within the range 303 – 313K studied in the absence and presence of inhibitors and halides. The efficiencies increased in the order: DMY [65.03% (49.72%)] < BTB [67.82% (56.37%)] < CSL [68.79% (58.75%)] < MO [71.98% (57.91%)] < TO [73.34% (59.62%)]. The effect of halides, namely NaCl, NaBr and NaI is also reported. The addition of halides enhanced the inhibition efficiency in the order: I- < Br- < Cl- . The synergism parameter (SI) evaluated are found to be less or equal to unity for aluminium corrosion and greater or equal to unity for mild steel corrosion due to the addition of halides. The enhanced inhibition efficiency on addition of halides is ascribed to antagonism (or passivity) and synergism for aluminium and mild steel respectively. BTB, DMY, MO, TO and CSL were found to obey Freundlich and Langmuir adsorption isotherms at all concentrations studied for aluminium and mild steel corrosion. Physical adsorption is proposed from the activation energy, (Ea < 40kJmol-1 ) obtained for aluminium and mild steel. The results obtained from the study were treated kinetically and values of Qads (a thermodynamic parameter) were evaluated and reported. xx The kinetic data obtained indicates that the adsorption follows a first order type of reaction. The rate laws for the inhibition process involving BTB, DMY, MO and TO as well as the mechanism of inhibition of CSL on aluminium and mild steel surfaces have been proposed. The difference in inhibitor behaviour has been explained on the basis of their molecular structures, number of substituent(s)/functional groups, electronic effects and molecular masses. Phytochemical screening of CSL leaves extract revealed the presence of alkaloids, saponins, tannins, phenols (having –C=O, -C=N, C-OH, >C=C< etc functional groups) which were found to contribute greatly to the inhibitory properties of CSL on aluminium and mild steel.
Related Project Materials
An evaluation of HR policies and employee well-being in First Bank Nigeria Plc, Kwara State
Background of the Study
Human Resource (HR) policies are designed to manage an organization’s workforce effectively....
An Examination of Government Intervention Policies on Agricultural Extension Services in Kachia Local Government, Kaduna State
Background of the Study
Agriculture remains a crucial sector for economic development in rural Nigeria. Kachia Local Gov...
An appraisal of debit charge reform impacts on transactional behavior in banking: a case study of United Bank for Africa
Background of the Study
Debit charge reforms have emerged as a critical policy tool for banks aiming to balance revenue generation with c...
Development of a Data-Driven Approach for Detecting Student Absenteeism Patterns in Yola North Local Government, Adamawa State
Background of the Study
Student absenteeism is a significant challenge in the educational sector, directly affecting acade...
THE IMPACT OF CUSTOMER VALUE PROPOSITION ON BUSINESS STRATEGIES
THE IMPACT OF CUSTOMER VALUE PROPOSITION ON BUSINESS STRATEGIES
This study aimed to determine the impact of customer val...
An Investigation of Sentiment Analysis in Political Campaign Strategies: A Case Study of Electoral Campaigns in Katsina State
Background of the Study
Sentiment analysis, a branch of natural language processing, is increasingly us...
A Critical Analysis of Corporate Expansion Through Franchising: A Study of Restaurant Chains in Kwara State
Background of the Study
Franchising has become a prominent method for businesses to ex...
An Appraisal of Work-Life Balance and Psychological Well-Being in Kaduna State
Background of the Study
Work-life balance has emerged as a critical issue in modern...
The impact of forex risk management on profitability in banking: a case study of United Bank for Africa
Background of the Study
Foreign exchange (forex) risk management is crucial for banks operating in international markets, w...
An Assessment of Depression and Its Management in Elderly Patients in Kaduna State
Background of the Study
Depression is a common mental health disorder among the elderly, yet it often...
