TY - JOUR
T1 - Effects of accelerated weathering and hygrothermal ageing on the thermomechanical properties and residual stresses of epoxy amine coatings
AU - Ng, Janice Xin Yee
AU - Tan, Nicholas Sheng Loong
AU - Golovanevskiy, Vladimir
AU - Farhat, Hanan
AU - Pojtanabuntoeng, Thunyaluk
N1 - Publisher Copyright:
© 2025 The Authors
PY - 2025/4
Y1 - 2025/4
N2 - The effect of artificial weathering and/or hygrothermal ageing on the thermomechanical properties of epoxy amine coating and the subsequent effect on the residual stresses (thermal and hygroscopic stresses) was investigated. Variations in the thermomechanical properties of coatings after artificial weathering and/or hygrothermal ageing, in comparison to fresh samples, were evaluated through various analyses. Feasibility of the determination of coefficient of hygroscopic expansion (alpha HF) from the slope of the plot of polynomial-fitted hygroscopic strain (& varepsilon;hygro) and moisture concentration at saturation (Csat) was also assessed. Residual stresses of 229 MPa and 334 MPa were calculated based on experimentally determined properties. These stresses were found to exceed the compressive strength of the coatings, which explains the delamination observed in peel-off adhesion tests.
AB - The effect of artificial weathering and/or hygrothermal ageing on the thermomechanical properties of epoxy amine coating and the subsequent effect on the residual stresses (thermal and hygroscopic stresses) was investigated. Variations in the thermomechanical properties of coatings after artificial weathering and/or hygrothermal ageing, in comparison to fresh samples, were evaluated through various analyses. Feasibility of the determination of coefficient of hygroscopic expansion (alpha HF) from the slope of the plot of polynomial-fitted hygroscopic strain (& varepsilon;hygro) and moisture concentration at saturation (Csat) was also assessed. Residual stresses of 229 MPa and 334 MPa were calculated based on experimentally determined properties. These stresses were found to exceed the compressive strength of the coatings, which explains the delamination observed in peel-off adhesion tests.
KW - Accelerated weathering
KW - Corrosion under insulation
KW - Cui
KW - Epoxy
KW - Hygroscopic expansion coefficient
KW - Hygroscopic strain
KW - Hygrothermal stresses
KW - Organic coatings
KW - Residual stresses
KW - Thermal ageing
KW - Thermomechanical properties
KW - Uv
UR - http://www.scopus.com/inward/record.url?scp=85216883829&partnerID=8YFLogxK
U2 - 10.1016/j.porgcoat.2025.109126
DO - 10.1016/j.porgcoat.2025.109126
M3 - Article
AN - SCOPUS:85216883829
SN - 0300-9440
VL - 201
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
M1 - 109126
ER -