[Paper on sun angles](https://www.researchgate.net/publication/283051726_A_comprehensive_solar_angles_simulation_and_calculation_using_Matlab)
[matlab function for angles](https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/5430/versions/1/previews/sun_position.m/index.html)
## Galvanic corrosion
https://chemistry.stackexchange.com/questions/66501/ok-to-separate-steel-from-aluminum-with-bronze-galvanic-action
https://www.decc.com/coating/corrosion-protection/
https://www.decc.com/recent-articles/xylan-coatings-high-performance-fluoropolymers-for-function-in-extreme-conditions/
https://www.indconsupply.com/steel-it-polyurethane-aerosol-black-14oz-1012b.php?gclid=Cj0KCQjwpdqDBhCSARIsAEUJ0hMrgv_CpTaCRKWdalQlww-dn9rOYg4s44rqlBg6lgPckqAKDthed5waAvymEALw_wcB