This guide describes the use of the visual reference photographs depicting the appearance of mill scale-free, unpainted, rusted carbon steel prior to and after cleaning by water jetting (WJ). The steel surfaces had previously been blast cleaned to remove the mill scale and were then allowed to rust. Although prepared from unpainted steel, the photographs are also suitable for depicting the appearance of painted steel after water jetting.
NOTE: SSPC and NACE International Visual Reference Photographs are intended to supplement SSPC-SP 12/NACE No. 5. Due to the time required for consensus review, and the industry demand for immediate assistance in evaluating surfaces cleaned by water jetting, SSPC and NACE have issued this document as an interim status guide, using preexisting photographs which could not be adjusted or replaced. Therefore, these photographs and their descriptions do not exactly match the descriptions in SSPC-SP 12/NACE No. 5. The pictures and descriptions of flash rusting are included for information only and have not been established as standards. A new series of photographs is currently undergoing consensus review, which will result in the development of a set of photographs and text which will replace this interim guide. As the written standards are the primary means to determine conformance with cleaning requirements, the photographs should not be used as a substitute for these standards.The guide is applicable to surfaces produced by a range of water jetting pressures. This guide can be used to clarify the acceptable level of flash rusting allowed prior to the application of protective coatings.
