Norman Seabrook, president of the city’s Correction Officers’ Benevolent Association, was arrested early Wednesday on federal corruption charges, officials said. Seabrook, 56, was taken into custody by federal agents at his Morris Park home in the Bronx about 6 a.m. He was under investigation for allegedly receiving kickbacks from an investment firm that does business with the 9,000-member union — the largest municipal jail union in the country.