Abstract
• 3D printed solution with acceptable corrosion resistance towards chemical weathering faced by heritage structures. • Effect of acid rain on 3D printed customized innovative strips of PVDF composite. • Innovative PVDF composite based smart strips for crack repair. In the recent past, some studies have been reported on applications of 3D printing processes as an innovative and cost-effective solution for the maintenance and repair of heritage structures. But hitherto little has been reported on ascertaining the weathering effect (acid rain) on such heritage structures revamped as 3D printed customized solutions. This study highlights the effect of H 2 CO 3 on 3D printed customized innovative strips with alternate layers of conducting (polyvinylidene fluoride (PVDF)-6%graphene-3%Mn-doped-ZnO) and non-conducting (PVDF-6%CaCO 3 ) composites engineered for controlled self-expansion and contraction (SEC). Based on the acceptable SEC features of the innovative 3D printed strip (as 4D characteristics), the composite structure was tested for corrosion resistance to mimic the acid rain environment. The results obtained for composite structure based on the Tafel exploration outlined that the proposed 3D printed solution possesses acceptable corrosion resistance (2.84 × 10 -7 mm/y) towards chemical weathering faced by heritage structures.
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