Corrosion Prevention of Additively Manufactured Aluminum Packing Devices Developed for Process Intensification of CO₂ Capture by Aqueous Amines

Abstract

Corrosion of additively manufactured (i.e., 3D printed) aluminum packing devices, developed to enhance heat and mass transfer in CO 2 absorption columns using amine-CO 2 scrubbing solutions, is investigated in this paper. The aluminum structures printed by selective laser melting with Al-10Si-0.3Mg feed powder are susceptible to corrosion in aqueous monoethanolamine, both fresh and used CO 2 -saturated solutions. The efficacy of corrosion-protective surface layers of aqueous polyether−ketone−ketone (PEKK) dip coating to provide amine corrosion resistance to the 3D printed aluminum structure is also evaluated. PEKK nanothick layers were coated on the corrugated surface of a 3D printed structure, identical to that of the intensified device, yielding 27 times higher corrosion resistance than the uncoated Al alloy surface. A systematic long-term electrochemical corrosion analysis revealed that a multilayer PEKK dip coating protocol enables protection of the 3D printed Al alloy surface in various CO 2 −monoethanolamine solutions.

Lithium nitrate salt-assisted CO2 absorption for the formation of corrosion barrier layer on AZ91D magnesium alloy

“…Various coating approaches have been examined for Mg and Mg alloys, including superhydrophobic coatings, [20][21][22] plasma electrolytic oxidation and anodization, [23][24][25][26] inorganic chemical and uoride coatings, [27][28][29][30] cold spray coatings [31][32][33][34] or polymer coatings. 35,36 However, a single coating alone is insufficient to provide adequate protection for Mg surfaces in automotive body applications. As a result, multilayer coating schemes using wet chemical processes have been proposed to ensure reliable Mg protection.…”

A turn-off fluorescent sensor for metal ions quantifies corrosion in an organic solvent

“…However, corrosion issues can result in structural failure in both aqueous and in organic or mixed-solvents environments, which leads to enormous economic losses, injuries and even death. [8][9][10][11][12][13][14][15][16][17][18][19][20] To avoid such failures, it is essential to sense and quantify corrosion in different environments.…”

Two Steady-State Adsorption Modes of Phosphonic Acids on Aluminum Surfaces

“…Aluminum alloys are widely used as structural materials in the automobile, aerospace, and construction industry due to their low weight and outstanding engineering properties . An aluminum surface treatment is necessary in many cases, in particular, for corrosion protection, adhesive joining, , or polymer coating . This surface treatment provides an improvement of the interfacial stability and anchoring points for the chemical bond between the aluminum oxide and a polymer layer .…”