This special edition presents the latest research results in materials engineering, machinery technologies, construction and chemical technologies for wastewater treatment. The special collection will be helpful to many specialists whose activity is related to materials science, machinery, ecological safety and construction. Steel, Alloy, Mechanical Properties, Corrosion, Coating, Computational Materials Science, Wastewater Treatment, Dye Removal, Green Building Materials, Concrete, Geopolymer, Structural Element, Structural Mechanics, Non-Destructive Testing, Machinery Production Materials Science, Building Materials, General Engineering