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This guide describes the use of reference photographs depicting the appearance of both previously unpainted and previously painted and partially rusted hot-rolled carbon steel prior to and after abrasive blast cleaning.
The reference photographs consist of a series of 1:1 (actual size) color photographs. The photographs were taken under controlled studio lighting designed to show the maximum detail possible.
Highlighted in the guide are five initial rust conditions before surface preparation, covering the rand from intact mill scale to rusted and pitted steel, as well as previously painted steel.
¡Esta guía de referencia fotográfica está en inglés y español!
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SSPC-VIS 2 provides a method to evaluate the degree of rusting on painted steel (or iron) surfaces. The reference color photographs and corresponding black and white images, which depict the percentage of rusting given in the written specification, form part of the standard.
This standard quantifies the degree of rusting on painted steel surfaces with a zero to ten scale base on the percentage of visible rust present on the surface. Visible rust includes rust blisters and undercutting of the coating.
The rusting depicted in the photographs is not accompanied by blistering, but the photographs show staning associated with the rust.
The intent of this presentation will be to briefly analyze the evolution of the steel surface preparation market by focusing on three common methods for steel surface preparation used today (i.e., dry abrasive blasting, wet abrasive blasting and ultra-high-pressure blasting (UHP)) and the effects of water and additives on cleanliness, degree of surface preparation, coating integrity and coating adhesion. This presentation will include test results comparing the effects and results of different forms of surface preparation and the resulting coating application characteristics.