Enhanced corrosion protection by Al surface immobilization of in-situ grown layered double hydroxide films co-intercalated with inhibitors and low surface energy species

• In this work, a novel in-situ grown layered double hydroxide (LDH) film co-intercalated with inhibitors (vanadates) and low surface energy substance (laurates) was immobilized on Al substrates. A long-term monitoring of electrochemical impedance spectra (EIS) of the various samples in 3.5 wt.% NaCl solution demonstrated the synergetic protection of the intercalated two functional species. Meanwhile, the X-ray diffraction (XRD) result of the samples after immersion in NaCl solution for a long time presented the anion-exchange process between vanadates/laurates and chlorides. The synergetic effect of the two species loaded film significantly contributed to the enhanced long-term corrosion protection of aluminum.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

Keyword

Aluminum

EIS

Interfaces

Neutral inhibition

XRD

Aluminum corrosion

Electrochemical corrosion

Interfaces (materials)

Interfacial energy

Sodium chloride

Transition metal compounds

X ray diffraction

Electrochemical impedance spectra

Functional species

Layered double hydroxides

Long term monitoring

Low surface energy

Neutral inhibitions

Surface immobilization

Synergetic effect

Corrosion protection

Publication and Content Type

ref (subject category)

art (subject category)