Naslov
Anti-Corrosion Properties of Polyaniline Coating

Autori
Kraljić, Marijana ; Mandić, Zoran ; Duić, Ljerka

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Electrochemical Approach to Selected Corrosion and Corrosion Control Studies

Urednik/ci
Bonora, P.L. ; Deflorian, F. ;

Izdavač
IOM Communications

Grad
London : Delhi

Godina
2000

Raspon stranica
87-99

ISBN
1-86125-110-6

Ključne riječi
polyaniline coating, corrosion protection, sulfuric acid, phosphoric acid, hydrochlorid acid, stainless steel, low alloy steel, EIS

Sažetak
Polyaniline (PANI) coatings were electrosynthesised on steel samples (13 precentage and 5 precentage of Cr) using sulfuric and phosphoric acids as supporting electrolytes. The protective properties of the coatings in the supporting electrolytes were investigated by monitoring open-circuit potential versus time, and by applying EIS (electrochemical impedance spectroscopy). Polyaniline films have been found to provide corrosion protection. Thicker PANI films have capacitive behaviour at low frequencies with small resistance at high frequencies. Similar results were obtained on Pt. Thinner films exhibit much higher resistance probably because a significant amount of PANI is transformed from emeraldine (EM) to leucoemeraldine (LE). The protective film deposited in a phosphate solution seemed to have better properties than the film deposited in a sulfate solution and therefore this film was also tested in 0.1 molL^-1 HCl. In the chloride-containing solution, the time of protection was significantly shorter.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA