Mag Chloride-Bad Stuff

I own a '01 S-4 Audi that is about my favorite car of all times. We lived in the Vail Valley, Colorado for the first 3 years of the car's life-lots of nasty weather and lots of mag chloride on the roads. About a year ago, I had a pump of some sorts go out. The pump was located deep under the injection system, so getting to it was not easy or cheap. Once it was pulled, my mechanic in Denver noted that the plastic on the pump had deteriorated saying he had not seen this before. It was replaced. Not long after, I had another major plastic failure under the hood. More time and money. Then recently, while in Vail, I had a simple plastic T just fall apart. At the garage, the mechanic told me that this was common with cars subject to exposure to mag chloride. So all these failures are happening at once. I thought I had been pretty careful cleaning the engine compartment, but obviously I had not. Note that lots of cars use plastic components under the hood. So take some time to thoroughly clean this crude from under the hood and car.