Coordination Complexes and Biological Systems

Soni, P.L.; Soni, Vandna

doi:10.1201/9781003183426-13

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aluminum does not tend to form strong ammine complexes (metal complexes with at least one ammonia ligand). 74 Generally, Al with 3+ charge has a strong hydrolyzing tendency and affinity to oxygen. 1,2 Al as a p-block element differs from d-block elements like Co(III) and Cr(III), which form strong complexes with ammonia.…”

Section: Atomic Percentage (mentioning

confidence: 99%

See 1 more Smart Citation

Corrosion of Synthetic Intermetallic Compounds and AA7075-T6 in Dilute Harrison’s Solution and Inhibition by Cerium(III) Salts

Rodič

Costa²,

Frankel³

2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

This study addresses the behavior of an aluminum alloy and its components in conditions simulating the presence of atmospheric salts. The corrosion of synthetic intermetallic compounds (IMCs) Al2Cu, Al2CuMg, Al7Cu2Fe, MgZn2, and bulk aluminum alloy 7075-T6 was studied in dilute Harrison’s solution (DHS). For IMCs, electrochemical measurements were performed using a microcell, and a standard cell was used to study the bulk alloy. Bulk AA7075-T6 was less susceptible to corrosion in DHS than in chloride solution stemming from the beneficial presence of sulfate ions and lower chloride concentration. The susceptibility of IMCs to corrosion in DHS increased as Al2Cu < Al7Cu2Fe < Al2CuMg < MgZn2 due to the increased dissolution of Mg in the presence of ammonium ions. The relative nobility of IMCs was determined based on the galvanic current density. Ce salts acted as inhibitors for the alloy during 14-day testing, forming a Ce hydroxide layer. The degree of protection depended on the type of anion, being the highest for Ce acetate. For the IMC, however, inhibition by Ce salts did not occur during short measurements, indicating the importance of galvanic interaction with the alloy matrix in the inhibition, which was confirmed by long-term measurements of the alloy.

show abstract

Section: Atomic Percentage (mentioning

confidence: 99%

“…1,2 Al as a p-block element differs from d-block elements like Co(III) and Cr(III), which form strong complexes with ammonia. 74 Copper ions also form strong tetrammine complexes [Cu(NH 3 ) 4 ] 2+ . 75 However, the concentration of Cu 2+ ions dissolved from AA7075 available for complexation with ammonia is rather low.…”

Section: Atomic Percentage (mentioning

confidence: 99%