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At NINGBO INNO PHARMCHEM CO.,LTD., we are dedicated to advancing the understanding of material science, particularly in the realm of corrosion prevention. Our recent research on a novel organophosphorus derivative, DAMP, offers profound insights into effective copper corrosion inhibitor in acid applications. This article focuses on the intricate adsorption mechanism of copper corrosion inhibitor, which is central to DAMP's exceptional performance.
The effectiveness of any corrosion inhibitor is intrinsically linked to its ability to form a stable protective layer on the metal surface. For DAMP, this process is driven by the presence of multiple heteroatoms – nitrogen, oxygen, and phosphorus – within its molecular structure. These elements possess lone pairs of electrons that readily interact with the vacant d-orbitals of copper atoms. This interaction facilitates strong adsorption, a process that can occur through both physisorption (weaker, electrostatic forces) and chemisorption (stronger, chemical bonding).
The FTIR analysis of organophosphorus inhibitor confirmed the presence of these key functional groups and their interaction with the copper surface. Moreover, the SEM EDX analysis of corrosion inhibitor provided visual and elemental evidence of a distinct protective film formed by DAMP on the copper. This film acts as a physical barrier, preventing corrosive species from reaching the metal surface and initiating the electrochemical reactions that lead to corrosion.
Our findings, supported by the Langmuir adsorption isotherm for copper, demonstrate that DAMP molecules adsorb in a highly organized manner, maximizing surface coverage. This comprehensive surface interaction is a key factor in achieving the high inhibition efficiencies observed in our studies. By understanding and leveraging these adsorption mechanisms, NINGBO INNO PHARMCHEM CO.,LTD. is developing superior chemical solutions for demanding industrial applications, offering advanced protection for copper and other metals against corrosive environments.
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1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
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