Science
Brief description of Pickling and Passivation using Weldbrite and S-Weld:
🔧 Pickling
- Purpose: Removes surface contaminants, oxide scales, and weld discoloration from stainless steel after welding or fabrication.
- Process: Uses acidic chemicals (typically nitric and hydrofluoric acids) to clean and etch the metal surface.
- Product:
- Weldbrite: A pickling gel designed to treat stainless steel welds, removing heat tint and restoring the original finish.
🌫️ Passivation
- Purpose: Enhances corrosion resistance by forming a protective chromium-rich oxide layer on the stainless steel surface.
- Process: After pickling, the surface is treated with a nitric acid-based passivation solution, which promotes the formation of a passive layer.
- Product:
- S-Weld Passivator: Used to re-passivate stainless steel after pickling, ensuring long-term corrosion protection.
Density-Functional Theory (DFT)
A successful theory for calculating the electrical structure of atoms, molecules, and solids is density-functional theory (DFT). Its objective is to use the fundamental laws of quantum mechanics to quantitatively comprehend the properties of materials.
When combined with non-equilibrium Green’s functions, density functional theory (DFT) is a quantum-mechanical atomistic simulation technique that can calculate a wide range of properties of almost any type of atomic system, including those of molecules, and crystals, surfaces, and even electronic devices.
DFT is a member of the first principles (ab initio) approach family, so termed for their ability to predict material properties for unidentified systems without the use of experiments. DFT has become well-known among these due to the minimal computational effort needed.
The DFT technique is frequently used in the fields of organic and inorganic chemistry, materials science (such as ceramics or metallurgy), drug production, and electronic materials.