I can direct you to Al-Anon and if the children are old enough to benefit AlaTeen and also family therapy or individual counseling.

Neither you nor your children can fix your wife. Get help for yourself and your children and suggest help to your wife, but with the foreknowledge she is likely to explode and blame everything on you, or your perception, or the perception of the world at large. You would be correct in acknowledging to her that you made a mistake putting up with her rages all these years, but also correct in telling her that you are no longer going to be codependent and no longer allow the children to be subject to such disfunction.