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The purpose of this study was to investigate the performances of two inhibitors in controlling corrosion of steel products in industrial and marine atmosphere.

Corrosion rates were determined by weight loss measurements. At certain periods of atmospheric exposure, the (disc shape) specimens were retrieved and studied by scanning electron microscopy and energy-dispersive spectrometry surface analysis techniques.

Both inhibitors were effective against corrosion of steel in the early stages of the atmospheric exposure (for about two months). With further exposure to the atmosphere, their inhibition effectiveness deteriorated and was totally lost within four months. Analysis of the specimens before exposure showed that the inhibitor film was thin for both treatments, and the unexposed treated surface for both inhibitors appeared similar to the untreated unexposed specimen surface. Characterization of the specimens at different exposure periods showed fewer corrosion blisters on dicyclohexylamine nitrite- and sodium benzoate-treated surfaces than on untreated specimens.

The objective of this study was to characterize the surfaces of the steel products produced locally during their exposure to the industrial and marine atmosphere of the Arabian Gulf region after being treated by sodium benzoate and dicyclohexylamine nitrite in controlling the corrosion of local mild steel products. According to the literature review, this study is original and will add value to the studies of inhibition of steel corrosion under similar environments.

Ethical entrepreneurship and financing models based on Islamic principles are insufficiently researched and discussed in the emerging plural economic landscape. So far, Islamic theorists have made commendable efforts in this direction. To fill the knowledge gaps, this study aims to explore more rigorously the interdependence of halal entrepreneurship and Islamic finance in creating a strong halal ecosystem.

Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology, a systematic literature review (SLR) of 33 articles from 2001 to 2024 was conducted to answer three research questions. Publications were obtained using purposive sampling from the Scopus database. They were selected based on the ranking of high-quality journals, global coverage relevance to research and base years of publications.

Three key findings emerged from the SLR using the PRISMA protocol. First, halal entrepreneurship and Islamic finance complement each other by providing Shari’ah-compliant financial instruments, fostering ethical practices, enhancing market reach and ensuring business operations adhere to Islamic principles, thereby creating a cohesive halal ecosystem. Second, the strategic integration of halal entrepreneurship and Islamic finance – through innovation, sustainability practices, Shari’ah-compliant products, effective marketing and regulatory support – promotes economic growth, social welfare and sustainable development within the halal ecosystem. Third, Maqasid-ul Shari’ah principles guide halal entrepreneurship and Islamic finance by ensuring ethical standards, promoting social justice, emphasizing sustainability and ensuring that business and financial practices benefit society and adhere to Islamic ethical standards. These findings aid in developing a theoretically grounded conceptual framework for future empirical investigation.

Practically, policymakers, Islamic financial institutions and halal entrepreneurs can leverage this integrated approach to drive economic growth, social welfare and sustainable development, aligning operations with Maqasid-ul Shari’ah to ensure ethical standards and societal benefits. In addition, the findings aid in developing a theoretically grounded conceptual framework for future empirical investigation, both theoretically and methodologically.

Given the paucity of studies in this multidisciplinary area, this paper offers new insights into the interdependence of halal entrepreneurship and Islamic finance, grounded in the finance–growth nexus theory and Maqasid-ul Shari’ah principles. Unlike other exploratory studies, this research presents a theoretically grounded conceptual framework, paving the way for future empirical investigations.

The purpose of this study was to investigate the performances of three inhibitors in controlling corrosion of local mild steel products in distilled water and a simulated salt solution.

Corrosion inhibition of mild steel was investigated using electrochemical techniques. Untreated and inhibitor treated specimens were fully immersed in two test solutions, distilled water and the simulated solution of 2.0 wt.% NaCl and 1.0 wt.% Na2SO₄.

During full immersion in the simulated salt solution, sodium dihydrogen orthophosphate was not effective at all, resulting in even higher corrosion rates than that of the untreated specimens. Sodium benzoate was effective for three days only. Dicyclohexylamine nitrite was the most effective of them all, keeping its effectiveness for as much as 20 days. When the specimens were immersed in distilled water, all three inhibitors were effective during the 60 days of immersion while dicyclohexylamine nitrite and sodium benzoate treated specimens performed better than those treated with sodium dihydrogen orthophosphate.

The objective of this research was to investigate the performances of three inhibitors – sodium dihydrogen orthophosphate (inorganic) at 10 mM concentration, dicyclohexylamine nitrite (organic) and sodium benzoate (organic) at 100 mM concentration – in controlling the corrosion of local mild steel products fully immersed in two test solutions, distilled water and the simulated salt solution. All three inhibitors are film forming and anodic type inhibitors. According to the authors' literature review, this study is original and will add value to the studies of inhibition of steel corrosion under similar environments.