Salt-spray hours are a comparison tool, not a lifetime guarantee. Here is how to specify a finish that survives your real environment.
Neutral salt spray (ASTM B117) is an accelerated test. It ranks coatings against each other under one aggressive, constant condition — it does not predict how many years a part survives on a rooftop in Rotterdam.
What the hours are good for: comparing two suppliers' zinc plating, or verifying that a powder coat batch matches the qualified one. What they are not good for: assuming 480 hours in the chamber equals 480 weeks outdoors.
If corrosion matters, specify the environment, not only the hours: coastal, indoor-humid, road-salt, chemical. We will then propose a stack — for example zinc-nickel plus a passivate plus a topcoat — and test it to the number your customer requires.
Tooling costs money once; laser time costs money every part. Here is how we find the break-even for a real bracket.
Most sheet metal cost overruns are designed in, not manufactured in. These four rules catch the common ones.
Added capacity for medium-volume weldments, with a positioner that lets one operator load while the robot welds.