I will start building my 1st Homebuilt aircraft sometimes later this month. So, I have a basic question. When 4130 Normalized steel tubing comes in contact with aluminum in an aircraft structure, say for example, a 4130 steel tube Wing Spar in an aluminum wing structure, is there a "Galvanic" (or other) type of Corrosion Problem? If such a problem exists, what steps can be taken to prevent that corrosion? THANKS!!!