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Water Absorption of Underwater Products by Additive Manufacturing
Andrea Pino1, Iván Ibáñez-Felip1, Rosario Vidal1
1Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castelló de la Plana, Spain.
Materials (Basel, Switzerland)
|December 17, 2024
Summary
Low-cost stereolithography resins can be suitable for underwater prototypes, showing low water absorption. Coatings are generally not recommended for these 3D printed parts in aquatic environments.
Area of Science:
- Materials Science
- Additive Manufacturing
- Ocean Engineering
Background:
- Rapid prototyping offers speed and cost benefits.
- Stereolithography (SLA) is a key additive manufacturing technique.
- Underwater applications require materials resistant to water degradation.
Purpose of the Study:
- Evaluate low-cost SLA resins for underwater use.
- Determine water absorption percentages of different resin brands.
- Assess appearance and deformation after prolonged underwater exposure.
Main Methods:
- Tested multiple low-cost stereolithography resins.
- Measured water absorption in saltwater and chlorinated water.
- Evaluated resin performance with and without coatings.
Main Results:
- Some low-cost resins exhibit suitable water absorption (<3.3% in saltwater).
- Water absorption increased in chlorinated water compared to saltwater.
- Coatings typically used for fused filament fabrication are unsuitable for SLA underwater parts.
Conclusions:
- Certain affordable SLA resins are viable for underwater prototypes.
- Avoiding coatings is the optimal strategy for SLA underwater applications.
- This research provides critical data for material selection in marine environments.
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