There is no built in function for this. You can however accomplish this with a recipe step. I have attached a macro that contains this recipe step to accomplish this. The code for it is:
MERGE([PAD(FLOOR(DIVIDE(seconds, 3600)), 2, '0', left),PAD(FLOOR(MOD(seconds, 3600) / 60), 2, '0', left),PAD(MOD(seconds, 60), 2, '0', left)], ':')
where seconds is the column containing the seconds.