There is a HUGE construction project less than 1000 ft upwind (prevailing and regularly 15 to 25 mph) from our marina. The site consists of 8 acres that are being excavated down to 30ft. They are clearing an old iron and steel mill slag pond to erect a building. Every downwind surface is covered with fine dust from this project. We are working with the city and builder to mitigate the problem. We recently put a magnet to the dust and it has a high concentration of ferrous material. This stuff is like talc, it is so fine. It is getting into everything, halyards, sheets, shieves, coverings, blocks, the rigging wire, even deck surfaces are showing rust spots..... My concern and question is: Will the ferrous dust pentrating the rigging wire cause or accellerate corrosion of the stainless rigging?
