AI Article Synopsis
- Zinc (Zn) alloys are being explored as potential degradable biomaterials, but their corrosion in the gastrointestinal tract hasn't been thoroughly studied.
- This research examined how the enzymes pepsin and pancreatin affect pure Zn's degradation through electrochemical tests and immersion studies.
- The results indicated that while enzymes reduced general degradation rates, localized corrosion still occurred due to incomplete protection from pepsin, and pancreatin mainly offered initial corrosion protection during immersion.
Article Abstract
Zinc (Zn) alloys are being developed as the degradable biomaterial. However, the corrosion mechanism of Zn in the gastrointestinal environment is seldom investigated and needs to be addressed. In this study, the impacts of enzymes on the degradation of pure Zn via electrochemical measurements and immersion were investigated. Pepsin and pancreatin affected the degradation of pure Zn. In contrast with the solutions without enzymes, the degradation rates declined with the addition of enzymes in solutions. However, localized corrosion was observed because the adsorption of pepsin was not a perfect barrier to prevent corrosion. The adsorbed pancreatin protected the samples from corrosion mainly at the initial stage of immersion. With immersion in the simulated intestinal fluid, adsorption and desorption of pancreatin occurred simultaneously on the sample surface. These findings allow the development of Zn alloy-implanted devices for the digestive tract as well as the understanding of the Zn corrosion mechanism in the gastrointestinal environment.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9835524 | PMC |
| http://dx.doi.org/10.1021/acsomega.2c06752 | DOI Listing |
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