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Responsible management of aggregate waste to improve the properties of anti-corrosion coatings

Wygoda Mateusz, Jachimowski Artur

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

2023

z. 172

717--736

Purpose: The aim of the study was to investigate the possibility of using engineering waste materials in the form of brick dust and volcanic tuff as corrosion inhibitors. The corrosion tests were carried out on the aluminium alloys against aggressive corrosive environments with acidic pH containing chlorine compounds. Design/methodology/approach: The specimens for corrosion tests were cut from a sheet made of aluminium alloy EN AW-6060. In the first step the aluminium specimens was covered with a coating of clear alkyd varnish without any additives. In the next step used additives in the form of brick dust and vulcanic tuff were used. The tests were carried out using a RADWAG AS 310.R2 laboratory analytical balance to obtain the weight loss results for the specimens tested. Findings: Brick dust used in concentrations of 10% to 40% by weight cannot be considered as a material that allows achieving satisfactory results. This is due to the absorption of the corrosive medium by the brick dust. On the other hand, the volcanic tuff addition of 30% by weight creates conditions that slow down the corrosion process in the long term. Research limitations/implications: Consideration should be given to preparing all types of structural components for corrosion protection by blunting sharp edges for better adhesion of corrosion protection coatings. Therefore, further work should focus on obtaining a coating with an adequate adhesion as well as checking the action of volcanic tuff as an inhibitor in other corrosive media. Practical implications: The introduction of appropriately prepared volcanic tuff additives into protective coatings is expected to increase the effectiveness of the protection of the metal substrate against the corrosion process. It is therefore important to manage and monitor the factors that affect the coating and occur during the painting process. Originality/value: In tests confirmed the good properties of volcanic tuff, which slows down corrosion processes and preserves the uniform corrosion of aluminium. The result obtained has the lowest mass loss values of all the specimens prepared in the experiment, which proves the validity of using the volcanic tuff additive.

Efficiency of Brick Dust and Powdered Ceramsite in the Phosphorus Removal from Wastewater

Masłoń Adam, Czarnota Joanna

Journal of Ecological Engineering

2020

Vol. 21, nr 2

63--71

The biological methods of removing the phosphorus compounds from wastewater as applied currently at treatment plants may no longer be regarded as sufficient. They can therefore be augmented with physicochemical methods, raising the efficiency of the wastewater treatment system. Indeed, almost all large urban wastewater treatment plants practice precipitation of phosphorus using salts of iron and aluminum in the form of chemical coagulants. Nevertheless, the search for new ways of assisting with the removal of the biogenic element from wastewater, e.g. by dosing bentonites, fly ash and post-technological sludge from water treatment stations, or even unconventional organic sorbents such as rice husks, is ongoing. A further unconventional material in the P-removal from wastewater may take the form of powdered mineral materials. The work presented here shows the results of laboratory scale trials on the P-removal using brick dust and powdered ceramsite (expanded clay).