Corrosion inhibition of 2024-T3 aluminum alloy in 3.5% NaCl by thiosemicarbazone derivatives

Prakashaiah, B. G.; Kumara, D. Vinaya; Pandith, Anup; Shetty, A. Nityananda; Rani, Babita

doi:10.1016/j.corsci.2018.03.021

Cited by 136 publications

(59 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electron enrichment sites on molecules promote the adsorption on the metal surface. [14][15][16] The commonly used compounds include triazoles, 17 2-mercaptobenzothiazole, [18][19][20] 1-pyrrolidinedithiocarbamate 21 and 8hydroxyquinoline. However, organic compounds mentioned above mainly focus on iron, steel and copper.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The study of the local corrosion is performed as an effective method for evaluating the potentiodynamic polarization parameters. Due to the local dissolution of the bare sample, associated with the intermetallic compound, no passivity range can be seen for the bare sample 5 . Also, to calculate the corrosion current density (i corr ) of the specimens, the vertical line crossing the corrosion potential (E corr ) and interpolation of the cathodic branch was employed and the extracted results are illustrated in Table 2.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the surface of the blank sample is covered by corrosion products at longer times which shows severe corrosion attack on the surface of the specimen. Based on the literature, the intermetallic compounds in the structure of the AA2024-T3 are the main reason for the localizeed corrosion 5 . The increase in the amount of the oxygen on the surface of the blank sample versus the immersion time can be assigned to the aluminum oxide/hydroxide.…”

Section: Resultsmentioning

confidence: 99%

Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3

Mohammadi

Shahrabi

Mahdavian

et al. 2020

Sci Rep

View full text Add to dashboard Cite

In this work, cerium-diethyldithiocarbamate (Ce-DEDTC) complex was synthesized as a novel anticorrosion pigment. the structure of the synthesized pigment was characterized by employing fourier transfer infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, inductively coupled plasma optical emission spectroscopy, and ultraviolet-visible spectroscopy. All of the characterization techniques showed that the Ce-DEDTC pigment was successfully produced. The electrochemical tests were used to investigate the subsequence effect of the synthesized complex on the corrosion behavior of the AA2024-T3. AA2024-T3 showed a wide passive range in the presence of the Ce-DEDTC pigment. Scanning electron microscopy, optical microscopy, X-ray photoelectron spectroscopy, and contact angle tests were employed to investigate the effect of the synthesized pigment on aluminum surface properties. The result illustrated that the existence of the Ce-DEDTC complex led to the creation of a thin film on the AA2024-T3 surface, which was significantly inhibited the localized corrosion of the aluminum alloy.Due to high strength to weight ratio and low density, aluminum, and its alloys have found various industrial applications 1-3 . AA2024-T3 which is the precipitation hardening alloy, has various engineering applications in aeronautics and aerospace industries 4 . S-phase Al 2 MgCu and Al-Cu-Fe-Mn are the main intermetallic compounds in the structure of the 2024-T3 aluminum alloy 4,5 . In the presence of these intermetallic compounds, the substrate is locally degraded, especially in the presence of halide species 5 . The utilization of coatings, especially organic coatings, is a promising method to improve the corrosion performance of aluminum alloy against aggressive solutions 6 . But, it is well-known that the organic coatings alone don't have the long-term protective behavior against the aggressive ions. Due to the permeation of the oxygen, water, and corrosive ions through the organic coatings, as the main corrosive species for the metallic substrates, the metal is degraded even in the presence of the organic coatings 7 . Therefore, for improving the ability of the organic coatings against the destructive species, the use of other materials is a requirement.Inhibitive pigments are the main additives used to improve the corrosion protection functioning of the organic coatings in corrosive media. Pigments are utilized in different types and they have different protection mechanisms [8][9][10] . It is generally believed that the pigments are the fine particle size and insoluble materials used as colloidal dispersions which are added to the organic coatings for various purposes 11 . Providing the color, modifying the applications of the coatings, reducing the cost and improving the performance of the coatings are the main pigment applications 11 . Enhancing the organic coatings corrosion inhibition is the most important application of the pigments. Although it was mentioned that the pigments are the insoluble materials, the corrosi...

show abstract

“…A straight line at low frequency area may be attributed to the presence of the Walberg constant as a result of the movement of soluble metal species from the alloy surface to the bulk solution [23]. The diameter of the capacitive loop rises in the presence of Cys and the straight line in the low frequency region is removed at higher Cys concentrations, which may be attributed to the inhibitive effect of Cys on the corrosion process [31]. The results of Bode plots (Figure 2b) show that the frequency range with maximum phase becomes larger with increasing Cys concentration.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 98%

The Protection Role of Cysteine for Cu-5Zn-5Al-1Sn Alloy Corrosion in 3.5 wt.% NaCl Solution

et al. 2019

View full text Add to dashboard Cite

In this work, the corrosion mechanism of a Cu-5Zn-5Al-1Sn alloy was examined in a 3.5 wt.% NaCl solution. At the same time, the effect of a cysteine inhibitor was also investigated through a multi-analytical approach. Electrochemical results suggested that inhibition efficiency increased with the increase of cysteine concentration. From potentiodynamic polarization (PD) analysis, a decrease in corrosion current and corrosion potential shift toward a more negative direction was observed. The potential difference between the blank and inhibited surface was found to be 46 mV, which is less than 85 mV, revealing a mixed type inhibition effect of cysteine for the Cu-5Zn-5Al-1Sn alloy. The inhibition mechanism of cysteine (Cys) and the effect of alloying elements were investigated by fitting experimental impedance data according to a projected equivalent circuit for the alloy/electrolyte interface. A Langmuir adsorption isotherm was proposed to explain the inhibition phenomenon of cysteine on the Cu-5Zn-5Al-1Sn alloy surface. Surface morphology observation confirmed that the Cu-5Zn-5Al-1Sn alloy was damaged in 3.5 wt.% NaCl solution and could be inhibited by using the cysteine inhibitor. The impact of alloying elements on the corrosion mechanism was further examined by surface analysis techniques such as X-Ray photoelectron spectroscopy (XPS)/Auger spectra, the results of which indicated that the corrosion inhibition was realized by the adsorption of the inhibitor molecules at the alloy/solution interface. Appl. Sci. 2019, 9, 3896 2 of 17 latter largely present at the outmost surface of both Cu and the Cu5Zn5Al1Sn alloy [7,11]. Although a big difference exists in their corrosion rates, the corrosion process is highly administered by the molecular diffusion between the metal surface and the electrolyte [12].One approach to prevent corrosion of Cu and its alloy is the use of corrosion inhibitors [13,14]. Among the corrosion inhibitors used in practice, cysteine (Cys) is found to be widely employed for Cu protection in various media [15,16]. Cysteine is an amino acid that contains a -SH group in addition to the amino group; this mercaptan group is strongly attracted to copper. A. A. Nazeer et al. have studied the inhibitive effect of cysteine on a Cu10Ni alloy in sulfide containing atmospheres [16]. Based on this study, cysteine can act as a mixed-type inhibitor and cysteine molecules are adsorbed on the alloy surface. The inhibition mechanism of cysteine with copper-based materials is characterized by the formation of a stable Cu (I)-cysteine complex [17]. As confirmed by many researchers, the better corrosion inhibition effect of cysteine relies on its surface adsorption through sulfur atoms [18,19]. I. Milošev et al. on the other hand have studied different amino acids as inhibitors for copper in acidic environments and confirmed that cysteine has higher efficiency. Based on their molecular dynamic simulation results, it has been suggested that the -SH group is in charge of the good protective effect of cysteine [20...

show abstract

Corrosion inhibition of 2024-T3 aluminum alloy in 3.5% NaCl by thiosemicarbazone derivatives

Cited by 136 publications

References 65 publications

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3

The Protection Role of Cysteine for Cu-5Zn-5Al-1Sn Alloy Corrosion in 3.5 wt.% NaCl Solution

Contact Info

Product

Resources

About