RT Journal Article
T1 Characterization of phosphate coatings: influence of the acid pickling conditions
A1 Díaz Fernández, Belén
A1 Novoa Rodríguez, Xosé Ramón
A1 Pérez Pérez, María Carmen
A1 Silva Fernández, Sheila
K1 3303.07 Tecnología de la Corrosión
K1 3312 Tecnología de Materiales
K1 3303 Ingeniería y Tecnología Químicas
AB This research emphasizes the importance of the acid cleaning prior to the phosphate development on high-strength steel rods. It compares the phosphate properties achieved after different acid-pickling conditions. The most common inorganic acids were considered in this study. Additionally, taking into account the environmental and safety concerns of these acids, the assessment of a less harmful organic acid is presented. This study revealed significant differences in the coating morphology and chemical composition whereas no great changes were found in terms of the coating weight or porosity. Thus, hydrochloric and sulfuric acid promote the growth of a Fe-enriched phosphate layer with a less conductive character that is not developed after the pickling with phosphoric acid. The phosphate developed after the citric acid pickling is comparable to that developed after the inorganic acids although with a porosity slightly higher. The temperature of the citric acid bath is an important parameter that affects to the phosphate appearance, composition, and porosity.
PB Materials
SN 19961944
YR 2021
FD 2021-02-23
LK http://hdl.handle.net/11093/2008
UL http://hdl.handle.net/11093/2008
LA eng
NO Materials, 14(4): 1048 (2021)
DS Investigo
RD 16-sep-2024