Andressa Trentin
@vttresearch.com
Research Scientist
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Science, Electrochemistry, Surfaces, Coatings and Films, Metals and Alloys
Scopus Publications
Scopus Publications
Mayara Carla Uvida, Andressa Trentin, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Peter Hammer
Elsevier BV
A. Trentin, R. Samiee, A.H. Pakseresht, A. Duran, Y. Castro, and D. Galusek
Elsevier BV
E. Huttunen-Saarivirta, E. Bohner, A. Trentin, and M. Ferreira
Elsevier BV
Peter Hammer, Mayara Carla Uvida, and Andressa Trentin
MDPI AG
Nowadays, steel and light alloys, such as aluminum, magnesium, and titanium, represent most of the primary components of metallic structures in many applications [...]
Andressa Trentin, Victória Hellen Chagas, Mayara Carla Uvida, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Peter Hammer
MDPI AG
Organic-inorganic coatings based on polymethyl methacrylate (PMMA)–silica–lithium are an efficient alternative to protect metals against corrosion. Although the preparation methodology is established and the thin coatings (~10 µm) are highly protective, the use of an environmentally friendly solvent has not yet been addressed. In this work, PMMA–silica coatings were synthesized using 2-propanol as a solvent and deposited on aluminum alloy AA7075, widely used in the aeronautical industry. Different concentrations of lithium carbonate (0–4000 ppm) were incorporated into the hybrid matrix to study the structural and inhibitive effects of Li+ in terms of barrier efficiency of the coatings in contact with saline solution (3.5% NaCl). Structural and morphological characterization by low-angle X-ray scattering, X-ray photoelectron spectroscopy, atomic force microscopy, thermogravimetric analysis, thickness, and adhesion measurements, showed for intermediate lithium content (500–2000 ppm) the formation of a highly polymerized PMMA phase covalently cross-linked by silica nodes, which provide strong adhesion to the aluminum substrate (15 MPa). Electrochemical impedance spectroscopy (EIS) results revealed an excellent barrier property in the GΩ cm2 range and durability of more than two years in a 3.5% NaCl solution. This performance can be attributed to the formation of a highly reticulated phase in the presence of Li, which hinders the permeation of water and ions. Additionally, the self-healing ability of scratched samples was evidenced by EIS assays showing a fast Li-induced formation of insoluble products in damaged areas; thus, constituting an excellent eco-friendly solution for corrosion protection of aerospace components.
Andressa Trentin, Amirhossein Pakseresht, Alicia Duran, Yolanda Castro, and Dušan Galusek
MDPI AG
The development of anti-corrosion polymeric coatings has grown exponentially in the fields of material science, chemistry, engineering, and nanotechnology during the last century and has prompted the evolution of efficient characterization techniques. Nowadays, polymeric coatings represent a well-established protection system that provides a barrier between a metallic substrate and the environment. However, the increase in complexity and functionality of these coatings requires high-precision techniques capable of predicting failures and providing smart protection. This review summarizes the state of the art for the main electrochemical techniques, emphasizing devices that track the anti-corrosion properties of polymeric coatings from the macroscale to the nanoscale. An overview of the advances in accelerated corrosion testing and the electrochemical characterization of coatings is explored, including insights into their advantages and limitations. In addition, the challenges and potential applications of the theoretical approaches are summarized based on current knowledge. Finally, this work provides the reader with the trends and challenges of designing future technologies and models capable of tracking corrosion and predicting failures.
Mayara Carla Uvida, Andressa Trentin, Samarah Vargas Harb, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Peter Hammer
American Chemical Society (ACS)
Andressa Trentin, Mayara Carla Uvida, Adriana de Araújo Almeida, Thiago Augusto Carneiro de Souza, and Peter Hammer
Elsevier
Samarah V. Harb, Mariana S. Rodrigues, Thiago A.C. de Souza, Andressa Trentin, Mayara C. Uvida, Daniel J. Pochapski, Sandra H. Pulcinelli, Celso V. Santilli, and Peter Hammer
Elsevier BV
A. Trentin, S.V. Harb, M.C. Uvida, K. Marcoen, S.H. Pulcinelli, C.V. Santilli, H. Terryn, T. Hauffman, and P. Hammer
Elsevier BV
Samarah V. Harb, Nicole J. Bassous, Thiago A.C. de Souza, Andressa Trentin, Sandra H. Pulcinelli, Celso V. Santilli, Thomas J. Webster, Anderson O. Lobo, and Peter Hammer
Elsevier BV
Samarah Vargas Harb, Mayara Carla Uvida, Andressa Trentin, Anderson Oliveira Lobo, Thomas Jay Webster, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Peter Hammer
Elsevier BV
Samarah V. Harb, Andressa Trentin, Mayara C. Uvida, Marina Magnani, Sandra H. Pulcinelli, Celso V. Santilli, and Peter Hammer
Elsevier BV
Samarah Vargas Harb, Andressa Trentin, Thiago Augusto Carneiro de Souza, Marina Magnani, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Peter Hammer
Elsevier BV
Samarah Vargas Harb, Andressa Trentin, Mayara Carla Uvida, and Peter Hammer
Elsevier
Andressa Trentin, Andressa de L. Gasparini, Flávio A. Faria, Samarah V. Harb, Fábio C. dos Santos, Sandra H. Pulcinelli, Celso V. Santilli, and Peter Hammer
Elsevier BV
Andressa Trentin, Samarah V. Harb, Mayara C. Uvida, Sandra H. Pulcinelli, Celso V. Santilli, Kristof Marcoen, Sven Pletincx, Herman Terryn, Tom Hauffman, and Peter Hammer
American Chemical Society (ACS)
In this work, structural and active corrosion inhibition effects induced by lithium ion addition in organic-inorganic coatings based on polymethyl methacrylate (PMMA)-silica sol-gel coatings have been investigated. The addition of increasing amounts of lithium carbonate (0, 500, 1000 and 2000 ppm), yielded homogeneous hybrid coatings with increased connectivity of nanometric silica cross-link nodes, covalently linked to the PMMA matrix, and improved adhesion to the aluminum substrate (AA7075). Electrochemical impedance spectroscopy (EIS), performed in 3.5% NaCl aqueous solution, showed that the improved structural properties of coatings with higher lithium loadings result in an increased corrosion resistance, with an impedance modulus up to 50 GΩ cm2, and revealed that the lithium induced self-healing ability significantly improves their durability. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) suggest that the regeneration process occurs by means of lithium ions leaching from the adjacent coating towards the corrosion spot, which is restored by a protective layer of precipitated Li rich aluminum hydroxide species. An analogue mechanism has been proposed for artificially scratched coatings presenting an increase of the impedance modulus after salt spray test compared to the lithium free coating. These results evidence the active role of lithium ions in improving the passive barrier of the PMMA-silica coating and in providing through the self-restoring ability a significantly extended service life of AA7075 alloy exposed to saline environment.
Ruben F.A.O. Torrico, Samarah V. Harb, Andressa Trentin, Mayara C. Uvida, Sandra H. Pulcinelli, Celso V. Santilli, and Peter Hammer
Elsevier BV