Recent content by FixItMan64

Yes, they do remove the oxygen by rusting. But the iron inside the packets has been ground to a fine powder (like flour). The finer the grind, the more surface area. The more surface area, the more reaction happens. So the packets rust much faster than the iron pipe lying outside on the ground...

A little more info on the cast iron subject. I'm also a professional welder by trade (for more than 10 years). To start off, I agree 100% with everything that 'the_whingnut' wrote. My welding school instructor had an interesting story about fixing a cast iron engine block from a fishing boat...