SAPH440 Corrosion: Serious Rust Pattern in VCI Bags

Summary for saph440 corrosion Discussion

Corrosion of SAPH440 steel packed in VCI bags is the issue raised by Azhar Hussain, who says metal-pressed SAPH440 parts are sprayed with oil, packed in VCI bags, and boxed 10 by 5, yet the middle four pallets keep showing recurring rust on every delivery. The excerpt provided contains only the question and no visible replies, so there is no named answerer or diagnosis to attribute. Based on the thread text alone, the problem appears to be a packaging or storage-related corrosion pattern affecting only certain pallet positions rather than all parts equally. Because no answers are included in the source excerpt, the page cannot be summarized with a confirmed remedy; the key takeaway is that the rust is localized and repeatable, suggesting a systematic issue in the packing arrangement, VCI protection, oil coverage, or handling conditions.

July 30, 2018

ACRONYMS:

SAPH = a structural automotive hot rolled steel
VCI = volatile corrosion inhibitor

Q. We metal press SAPH440 steel and pack for delivery sprayed with oil and placed in VCI bags. The parts are packed in boxes 10 by 5; strangely enough the middle 4 pallets seem to have a reoccurring rust effect each delivery.

Any opinions, I would be grateful.
Thank you.

Azhar Hussain
employee – Birmingham, U.K.