Iron in joints causes arthritis. An iron-saturated heart becomes a feeble pump. Your husband's two symptoms fit the picture of hemochromatosis. Iron could have invaded the pancreas and caused diabetes. The bronze tinge to his skin is a tip-off that skin cells are glutted with iron.
Treatment is straightforward.
Lower the body's iron content. Removing b lood, the major storehouse for iron, achieves that goal quickly. Treatment is lifelong. If organs have suffered no damage, then a hemochromatosis patient's life span is the same as that of a normal person's. Since hemochromatosis is a genetic disease, close relatives should alert their doctors and be tested for it.