Place the grated zucchini in colander and sprinkle all over with a pinch of salt. Place the colander over a bowl and let the zucchini sweat out the liquid for 15 minutes. After 15 minutes, press out a bit more of the liquid.
In a large bowl, whisk together the flour, onions, chives, garlic powder, salt and pepper. Whisk in eggs. Stir in drained zucchini and the fresh corn.
Heat 2 tablespoons of oil in a large saucepan over medium heat. Once hot, scoop spoonfuls of the zucchini fritters into the pan. Use 2 to 3 tablespoons of mixture for each fritter. Cook for 2 to 3 minutes per side or until golden brown. Gently flip and cook for 2 to 3 minutes more.
Transfer fritters to a paper-towel-lined plate to drain any excess oil. Repeat, adding more oil as needed. Serve with aioli mayonnaise.