Characterization of pigment-leached antifouling coatings using BET surface area measurements and mercury porosimetry

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this work BET surface area measurements and mercury porosimetry are used to characterize leached layers formed when seawater-soluble pigments (Cu2O and ZnO) dissolve during accelerated leaching of simple antifouling coatings. Measurements on single-pigment coatings show that an increasing fraction of Cu2O or ZnO pigment particles becomes unavailable for dissolution when the concentration of the pigment decreases in the coating and the interparticle distance in the binder matrix becomes larger. Experimental data for a coating initially containing a mixture of Cu2O and TiO2 pigments suggest that a substantial fraction of the smaller and inert TiO2 particles may be lost from the coating upon dissolution of the larger Cu2O particles. This inert particle translocation effect is important to take into account when interpreting polishing and leaching data and when developing mathematical models of antifouling coating behaviour because the active binder surface area and porosity of the leached layer are substantially increased. A similar effect was not observed for a coating with a mixture of ZnO and TiO2 pigments. The two experimental methods are expected to be useful for practical analysis of leaching of seawater-soluble components from commercial antifouling coatings.
Original languageEnglish
JournalProgress in Organic Coatings
Volume60
Issue number3
Pages (from-to)238-247
ISSN0300-9440
DOIs
Publication statusPublished - 2007

Cite this

@article{b5ee323e720e4ec79218959827867541,
title = "Characterization of pigment-leached antifouling coatings using BET surface area measurements and mercury porosimetry",
abstract = "In this work BET surface area measurements and mercury porosimetry are used to characterize leached layers formed when seawater-soluble pigments (Cu2O and ZnO) dissolve during accelerated leaching of simple antifouling coatings. Measurements on single-pigment coatings show that an increasing fraction of Cu2O or ZnO pigment particles becomes unavailable for dissolution when the concentration of the pigment decreases in the coating and the interparticle distance in the binder matrix becomes larger. Experimental data for a coating initially containing a mixture of Cu2O and TiO2 pigments suggest that a substantial fraction of the smaller and inert TiO2 particles may be lost from the coating upon dissolution of the larger Cu2O particles. This inert particle translocation effect is important to take into account when interpreting polishing and leaching data and when developing mathematical models of antifouling coating behaviour because the active binder surface area and porosity of the leached layer are substantially increased. A similar effect was not observed for a coating with a mixture of ZnO and TiO2 pigments. The two experimental methods are expected to be useful for practical analysis of leaching of seawater-soluble components from commercial antifouling coatings.",
author = "S{\o}ren Kiil and Kim Dam-Johansen",
year = "2007",
doi = "10.1016/j.porgcoat.2007.07.018",
language = "English",
volume = "60",
pages = "238--247",
journal = "Progress in Organic Coatings",
issn = "0300-9440",
publisher = "Elsevier",
number = "3",

}

Characterization of pigment-leached antifouling coatings using BET surface area measurements and mercury porosimetry. / Kiil, Søren; Dam-Johansen, Kim.

In: Progress in Organic Coatings, Vol. 60, No. 3, 2007, p. 238-247.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Characterization of pigment-leached antifouling coatings using BET surface area measurements and mercury porosimetry

AU - Kiil, Søren

AU - Dam-Johansen, Kim

PY - 2007

Y1 - 2007

N2 - In this work BET surface area measurements and mercury porosimetry are used to characterize leached layers formed when seawater-soluble pigments (Cu2O and ZnO) dissolve during accelerated leaching of simple antifouling coatings. Measurements on single-pigment coatings show that an increasing fraction of Cu2O or ZnO pigment particles becomes unavailable for dissolution when the concentration of the pigment decreases in the coating and the interparticle distance in the binder matrix becomes larger. Experimental data for a coating initially containing a mixture of Cu2O and TiO2 pigments suggest that a substantial fraction of the smaller and inert TiO2 particles may be lost from the coating upon dissolution of the larger Cu2O particles. This inert particle translocation effect is important to take into account when interpreting polishing and leaching data and when developing mathematical models of antifouling coating behaviour because the active binder surface area and porosity of the leached layer are substantially increased. A similar effect was not observed for a coating with a mixture of ZnO and TiO2 pigments. The two experimental methods are expected to be useful for practical analysis of leaching of seawater-soluble components from commercial antifouling coatings.

AB - In this work BET surface area measurements and mercury porosimetry are used to characterize leached layers formed when seawater-soluble pigments (Cu2O and ZnO) dissolve during accelerated leaching of simple antifouling coatings. Measurements on single-pigment coatings show that an increasing fraction of Cu2O or ZnO pigment particles becomes unavailable for dissolution when the concentration of the pigment decreases in the coating and the interparticle distance in the binder matrix becomes larger. Experimental data for a coating initially containing a mixture of Cu2O and TiO2 pigments suggest that a substantial fraction of the smaller and inert TiO2 particles may be lost from the coating upon dissolution of the larger Cu2O particles. This inert particle translocation effect is important to take into account when interpreting polishing and leaching data and when developing mathematical models of antifouling coating behaviour because the active binder surface area and porosity of the leached layer are substantially increased. A similar effect was not observed for a coating with a mixture of ZnO and TiO2 pigments. The two experimental methods are expected to be useful for practical analysis of leaching of seawater-soluble components from commercial antifouling coatings.

U2 - 10.1016/j.porgcoat.2007.07.018

DO - 10.1016/j.porgcoat.2007.07.018

M3 - Journal article

VL - 60

SP - 238

EP - 247

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

SN - 0300-9440

IS - 3

ER -