1. Onion: peel and thinly cut an onion; soak in vinegar and water at room temperature; set aside to marinate for 10-15 minutes. 2. Eggs: hard-boil; cool; peel and chop. 3. Crab meat: cut into cubes (if necessary). 4. Cucumbers: wash; peel; cut into cubes. 5. Corn: drain liquid. 6. Onion: drain liquid. 7. Combine onion, crab meat, cucumbers, corn and eggs in a large bowl. Add mayonnaise and salt; mix.

   1. Onion: peel and thinly cut an onion; soak in vinegar and water at room temperature; set aside to marinate for 10-15 minutes. 2. Eggs: hard-boil; cool; peel and chop. 3. Crab meat: cut into cubes (if necessary). 4. Cucumbers: wash; peel; cut into cubes. 5. Corn: drain liquid. 6. Onion: drain liquid. 7. Combine onion, crab meat, cucumbers, corn and eggs in a large bowl. Add mayonnaise and salt; mix.