Summary for ss430 wire black spots Discussion
SS430 wire black spots were most likely caused after coiling, not by the wire itself. Harish reported black spots on SS430 lashing wire, and Andrew Speer suggested the marks looked like oxidation from storage problems: check how the rolls were stored, whether something rusty or corrosive is dripping onto them, and whether condensation or a leaky roof is involved. A second answer from McHenry, Illinois agreed the spots crossing multiple strands indicate post-coiling contamination, not a manufacturing defect. That responder added that the distinct, uneven spots suggest the coil may have been splashed with a corrosive chemical, or even water, noting that 430 stainless is not highly corrosion resistant. The thread does not identify the exact cause, but it points strongly to external exposure during storage or handling.
Q. We are facing a recent issue with SS430 Lashing wire. We’ve noticed black spots on the wire surface.
This lot might deliver 1 or 2 years before. But not sure whether these black spot are because of oxidation or not. Please help me identify the actual root cause.
Harish Mahale
– Bangalore/ Karnataka, India
May 16, 2024
 | A. Hi Harish, you haven’t provided a lot of information about your wire rolls, but that looks like oxidation on it. I would be looking at how/where you stored the rolls, and look up as there is likely something dripping on them, maybe something rusty above them. Do consider that it may be condensation that is dripping on the rolls as well as a leaky roof. Andrew Speer A. Harish, Though it is a possibility the spots are something other than iron oxide, depending on what chemical it was hit with.
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