Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2023

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Porównanie skuteczności wybranych koagulantów w zintegrowanym procesie koagulacji i adsorpcji

Macherzyński Bartłomiej, Wszelaka-Rylik Małgorzata, Olszewska Sylwia

Technologia Wody

2023

Nr 2 (80)

53-56

Celem pracy było określenie skuteczności zintegrowanej koagulacji i sorpcji na poprawę podstawowych wskaźników wody takich jak: mętność, barwa i absorbancja UV254nm. W artykule przedstawiono wyniki badań wody podczas procesu koagulacji i zintegrowanego procesu koagulacji i sorpcji. Do analizy wybrano koagulanty wstępnie zhydrolizowane - FLOKOR1ASW, FLOKOR1,2A oraz FLOKOR15 oraz pylisty węgiel aktywny CWZ-22. Próbki wody poddane koagulacji oraz koagulacji i sorpcji pobrano z rzeki Wisty. Koagulanty w zintegrowanym procesie dozowano w optymalnej dawce wynoszącej 3,5 mg Al/dm3, a pylisty węgiel aktywny w dawkach od 20 do 100 mg/dm3. Podczas procesu najwyższe efektywności usunięcia mętności, barwy i absorbancji UV2M wynosiły odpowiednio 99,5 i 93,2 oraz 70,4%.

The aim of the study was was to determine the effectiveness of integrated coagulation and sorption on the improvement of basie water indicators such as: turbidity, color and absorbance UV254nm. The article presents the results of water tests during the coagulation process and the integrated process of coagulation and sorption. Pre-hydrolyzed coagulants - FLOKOR1ASW, FLOKORB1,2A and FLOKOR1S and powder-activated carbon CWZ-22 were selected for the analysis. Water samples subjected to coagulation as well as coagulation and sorption were collected from the Vistula river. Coagulants in the integrated process were dosed in the optimal dose of 3.5 mgAI/dm3, and powder-activated carbon in doses from 20 to 100 mg/dm3. During the process, the highest turbidity, color and absorbance UV2H removal efficiencies were 99.5, 93.2 and 70.4%, respectively.

Evaluation of the Possibility to Improve the Scratch Resistance of the AZ91 Alloy by Applying a Coating

Mróz Marek, Olszewska Sylwia, Rąb Patryk

Archives of Foundry Engineering

2023

Vol. 23, iss. 4

157--162

This paper presents the possibility of improving the scratch resistance of the AZ91 magnesium alloy by applying a WCCoCr coating using the Air Plasma Spraying (APS) method. The coating thickness ranged from 140 to 160 μm. Microstructural studies of the AZ91 magnesium alloy were performed. The chemical composition of the WCCoCr powder was investigated. The quality of the bond at the substrate–coating interface was assessed and a microanalysis of the chemical composition of the coating was conducted. The scratch resistance of the AZ91 alloy and the WCCoCr coating was determined. The scratch resistance of the WCCoCr powder-based coating is much higher than the AZ91 alloy, as confirmed by scratch geometry measurements. The scratch width in the coating was almost three times smaller compared to the scratch in the substrate. Observations of the substrate–coating interface in the scratch area indicate no discontinuities. The absence of microcracks and delamination at the transition of the scratch from the substrate to the coating indicates good adhesion. On the basis of the study, it was found that there was great potential to use the WCCoCr powder coating to improve the abrasion resistance of castings made from the AZ91 alloy.