Abstract
In this paper, three types of epoxy-based coatings (Polyamide, pure Polyamine, and Polyamine reinforced by glass-flake) used as a lining for potable water tanks were studied using experimental and finite element methods. Tensile, impact, and fatigue tests were conducted on uncoated and coated AISI 316 stainless steel. The test results show that the applied epoxy based coating improves the mechanical properties, increases of fatigue crack resistance, and enhance the dynamic fracture toughness. The fatigue crack propagation is influenced by the compositions of epoxy coating, and the glass-flake improves the coating resistance to fatigue crack propagation compared to other types.
Highlights
The water storage tank is a reservoir that varies significantly in size, shape, and design and used to store the drinking water
The mechanical properties: tensile strength (Su), yield strength (Sy) and modulus of elasticity (E) of AISI 316 stainless steel in cases of uncoated and coated by the three types of Jotun coatings were obtained from the stress-strain curves of Fig. (6) and these properties are listed in Table (2) with its standard division calculated using Eq(2)
In Model C, the impact energy is increased by large values compared to the uncoated AISI 316 stainless steel, and the significant difference becomes small at high temperatures
Summary
The water storage tank is a reservoir that varies significantly in size, shape, and design and used to store the drinking water. (Ebara et al, 1996), estimated the corrosion fatigue behavior of the ballast tank steel coated by tar epoxy resin KA 32 (TMCP) by using the corrosion fatigue test for the plane round bar specimen with different thicknesses of tar epoxy resin coating Their results indicated that there are improvements in corrosion fatigue strength in the lowest level of the stress, and the corrosion fatigue life was improved. (Mills and Eliasson, 2006), studied and reviewed the factors that influence initial cracks in marine cargo and water ballast tanks' structural frame They show that as the flexibility of the coatings is reduced, the ability to withstand mechanical fatigue is reduced and resulting coating cracks are initiating. The results show that the coatings change their response to impact loads at low temperatures and increase the adhesion of the coating in terms of pull-off strength
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