Coastal stainless fails by pitting and crevice attack rather than by bad material. How chlorides concentrate as a hot surface dries, why the top of a pipe can go first, and what molybdenum genuinely buys.
One process removes contamination and the other removes metal. Why passivating a tinted weld achieves nothing, what the depleted layer under the colour actually is, and how to specify finishing so the part resists corrosion.
Welding locks elastic strain into a part, and the real question is whether it matters. Where residual stress causes trouble, why most tube never needs a furnace, and how titanium changes the answer entirely.
A hot exhaust is longer than a cold one and the growth has to go somewhere. Why flange faces and shell seams fail before the tube does, and how support layout and compliance points decide what survives.
Two metals only corrode each other when an electrolyte joins them. How area ratio and drying cycles set the rate, where the couple appears on a real car, and the isolation and drainage choices that keep it predictable.
Stainless threads seize because two clean surfaces of the same alloy cold-weld under pressure. The mechanism, why impact drivers make it worse, and the assembly habits that keep a joint serviceable years later.
Chromium carbide forms in the band beside a weld and takes the element that keeps the metal stainless out of circulation. How the mechanism works, why travel speed and fit-up decide the outcome, and what a buyer can reasonably ask for.
A wrong delivery covers several different problems. This article separates transit damage, wrong variant, dimensional deviation and specification gaps, and explains how to record what you see and what good faith looks like from both sides.
