Inhibition Effect of 6-bromo-3-nitro-2-phenylimidazol[1,2-α] pyridine on the Corrosion of C38 Steel in H2SO4 Solution

The inhibition effect of 6-bromo-3-nitro-2-phenylimidazol[1,2-α] pyridine (BNPP) on the corrosion of C38 steel in 0.5 M H2SO4 was studied by weight loss , electrochemical methods. The results showed that BNPP was a good inhibitor in 0.5 M H2SO4 and this adsorption obeyed the Langmuir adsorption isotherm. The results obtained from the different corrosion evaluation techniques are in good agreement. Polarization curves showed that BNPP acted as a mixed-type inhibitor in sulfuric acid. The effect of the temperature on the corrosion behavior with addition of 10-3M of the inhibitor was studied in the temperature range 298-328 K, and the thermodynamic parameters were determined and discussed. Quantum chemical approach, using the density functional theory (DFT), was applied in order to get better understanding about the relationship between the inhibition efficiency and molecular structure of BNPP. The theoretical results were found to be consistent with the experimental data

Centralised Design and Production of the Ultra-High Vacuum and Laser-Stabilisation Systems for the AION Ultra-Cold Strontium Laboratories

This paper outlines the centralised design and production of the Ultra-High-Vacuum sidearm and Laser-Stabilisation systems for the AION Ultra-Cold Strontium Laboratories. Commissioning data on the residual gas and steady-state pressures in the sidearm chambers, on magnetic field quality, on laser stabilisation, and on the loading rate for the 3D Magneto-Optical Trap are presented. Streamlining the design and production of the sidearm and laser stabilisation systems enabled the AION Collaboration to build and equip in parallel five state-of-the-art Ultra-Cold Strontium Laboratories within 24 months by leveraging key expertise in the collaboration. This approach could serve as a model for the development and construction of other cold atom experiments, such as atomic clock experiments and neutral atom quantum computing systems, by establishing dedicated design and production units at national laboratories.Comment: 27 pages, 21 figure