Influence of LDH conversion coatings on the adhesion and corrosion protection of friction spot-joined AA2024-T3/CF-PPS

Anissa Bouali*, Natalia M. André, M.R. Silva Campos, M. Serdechnova, Jorge F. dos Santos, S. T. Amancio-Filho, Mikhail L. Zheludkevich

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Layered double hydroxide (LDH) conversion coatings loaded with corrosion inhibitors were suggested for the surface treatment of the aluminum alloy 2024-T3, prior to friction spot joining with carbon-fiber reinforced polyphenylene sulfide (AA2024-T3/CF-PPS). Vanadate was used as a model corrosion inhibitor. Lap shear testing method revealed an increase of approx. 20% of the joint’s adhesion performance when treated with LDH and before exposure to salt spray. The evaluation of the joints after exposure to salt spray demonstrated a significant difference in the corrosion behavior of the joints when the AA2024-T3 is treated with LDH loaded with nitrate and vanadate species. The LDH intercalated with nitrate revealed a clear improvement in the mechanical and corrosion resistance performance of the joints, even after 6 weeks of salt spray. However, the LDH intercalated with vanadate failed in providing protection against corrosion as well as preserving the mechanical properties of the joints. The effect of the galvanic corrosion was further investigated by zero resistance ammeter (ZRA) measurements as well as localized scanning vibrating electrode technique (SVET).
Originalspracheenglisch
Seiten (von - bis)197-210
Seitenumfang14
FachzeitschriftJournal of Materials Science & Technology
Jahrgang67
Frühes Online-Datum26 Jul 2020
DOIs
PublikationsstatusVeröffentlicht - 20 Mär 2021

Schlagwörter

  • Friction spot joining
  • Layered double hydroxide
  • Galvanic couple
  • Corrosion protection
  • Adhesion

ASJC Scopus subject areas

  • !!Mechanics of Materials
  • !!Ceramics and Composites
  • !!Mechanical Engineering
  • !!Metals and Alloys
  • !!Materials Chemistry
  • !!Polymers and Plastics

Fields of Expertise

  • Advanced Materials Science

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