In-process corrosion occurs on stock from the mill, on parts that are fleshly machined or fabricated, on pretreated material in the painting shop and on finished items in storage or transit. In each stage, attention must be paid to adequately provide corrosion control for the material. Corrosion control is the effort involved in eliminating deterioration after the part has been "finished." In the fabrication process, after every operation, the part can be considered a finished item depending on who is performing that operation. Environments that can be encountered by in-process parts will be discussed throughout the paper. Corrosion control methods/packaging concepts used at various stages will also be
discussed. Experience has shown that the timeframe for in-process parts can vary from as little as 24 hours to as much as 3 years. This makes selecting the corrosion control method/packaging very difficult. Materials include metallic and non-metallic items to be used in construction of hardware.
Keywords: In-process corrosion, environments, general corrosion, vapor corrosion, machining coolants, crevice corrosion, volatile corrosion inhibitor (VCI), packaging, phosphate coating, painting and rest preventive oils.