![]() ![]() By facilitating ice release at low speeds, this coating protects the bracket surface and adjacent foam. The unconfined placement of the ice in the Peel Test makes this test amenable to a variety of ice types (e.g., saline spray ice and accretion ice).ĬRREL researchers developed a hybrid ice-resistant coating based on commercially available products to protect the main fuel tank of space shuttles. Ice adhesion testing configurations available at CRREL: (a) Zero Degree Cone Test where ice is grown in the curved interstitial space between the cylindrical pile and mold, (b) Double Lap Shear Test where freshwater polycrystalline ice is grown in the interstitial space between the planar laps, (c) Peel Test configured for Mode II shear testing, and (d) Peel Test configured for Mode I tensile loading. Furthermore, the Peel Test can be configured for either Mode I tensile or Mode II shear loading (Figure 3c,d).įigure 3. ![]() The Peel Test (Figure 3c,d) uses an open planar configuration and thus can be used with saline spray ice and accretion ice in addition to freshwater polycrystalline ice. The Double Lap Shear Test (Figure 3b)4 is an ASTM standard test index test (ASTM D3528) that is configured to assess a flat test coupon (planar interface). Now known as an industry standard, the Zero Degree Cone Test (ZDCT, Figure 3a)3 is widely used as an index test for screening the adhesion of freshwater ice to coatings under development. (Raw data files available upon request.)ĮRDC-CRREL has a versatile set of ice adhesion testing methods that can both serve as an index test for comparing a set of samples during the R&D phase of a project or as a more quantitatively rigorous measurement on promising candidate coatings for low ice adhesion applications.
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