Optimizing graphene-enhanced biobased coatings for corrosion protection of hot-dip galvanized steel
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB - Bioscience and Materials / Surface, Process and Formulation |
| Funding from Vinnova | SEK 1 000 000 |
| Project duration | May 2020 - May 2023 |
| Status | Completed |
| Venture | Strategic innovation program SIO Grafen |
| Call | SIO Grafen - Collaboration on commercial graphene applications, spring 2020 |
Important results from the project
RISE, SSAB, and NUC have studied graphene as a barrier additive to enhance the corrosion resistance of the SSAB-patented GreenCoat BT coil-coated steel. To optimize graphene-oil dispersion in order to develop the coating formulation enhanced by graphene to maximize the corrosion protection of existing SSAB bio-based coating.
Expected long term effects
A surface modification system was developed to disperse graphene in different desired diluent. A modified processing method was developed to prepare much more stable graphene dispersions. A series of methods for evaluation of graphene dispersions was established. Both UV and corrosion protection properties improved by adding graphene to the coating system.
Approach and implementation
We explored various surface modifiers and graphene grades and evaluated graphene dispersions in desired media. We developed some advanced methods for preparation of stable graphene dispersions. Additionally, couple of characterization methods were optimized to evaluate particle size, graphene concentration and colloidal stability of graphene dispersions. The graphene dispersions were successfully incorporated into GreenCoat® formulation resulted improved anticorrosion performance when applied on hot-dip galvanized steel substrates.