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HISTORICAL DOCUMENT. Defines the Thorough Cleaning (WJ-3) degree of surface cleanliness - one of four levels (WJ- 1,2,3,4) achieved by the use of waterjet cleaning.
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HISTORICAL DOCUMENT. Defines the Light Cleaning (WJ-4) degree of surface cleanliness - one of four levels (WJ- 1,2,3,4) achieved by the use of waterjet cleaning.
Esta norma conjunta da SSPC/NACE International aborda a preparação de superfícies de concreto antes da aplicação de revestimento ou sistemas de proteção. Esta norma deve ser usada pelos especificadores, aplicadores, inspetores e outros responsáveis por definir um grau padrão de limpeza, resistência, perfil e secura de superfícies de concreto preparadas.
Characteristics of water blasting methods. Equipment required. Operating procedures. Safety precautions and methods. Time requirement tables. Classifications of items, structures and surface conditions successfully cleaned. Historical Document 1972
This guide describes the use of reference photographs depicting the appearance of unpainted rusted carbon steel and painted carbon steel, with or without rust, prior to and after cleaining by waterjetting.
This guide, which consists of actual-size color photographs, can be used to clarifty the acceptable level of flash rusting allowed prior to the application of protective coatings.
This AMPP standard covers the preparation of concrete surfaces before the application of protective coating or lining systems. This standard should be used by specifiers, applicators, inspectors, and others who are responsible for defining a standard degree of cleanliness, strength, profile, and dryness of prepared concrete surfaces.
Offshore assets such as drilling rigs, production platforms, and wind turbines present challenges for corrosion prevention maintenance. The primary defense against atmospheric corrosion on structural steel in offshore saltwater environments is a protective coating system.
Several factors cause protective coatings to degrade rapidly: besides wearing and damage encountered in installation and use, ultraviolet light breaks down the organic resins and corrosive seawater causes under creep at any breaks in the coating. Maintenance coating for offshore atmospheric systems can therefore be necessary as early as the second year.
Almost 20 years ago the use of Ultra High Pressure Waterjetting (UHP) in shipyards for maintenance and for offshore projects started to be pushed, due to the development of surface and moisture tolerant paint technology becoming available. This was recognized by the likes of US Navy and Petrobras at the time.
The objective of this study was to examine the effects of an ultra-high pressure (UHP) waterjetting surface preparation (>25,000 psi) on the performance properties of select marine/offshore coating epoxy systems. Uncoated steel panels had been allowed to rust in an outdoor atmospheric environment and then were subjected to UHP waterjetting
Water, steam, and waterjetting have long been used in the conservation of historic artifacts and structures such as the R.M.S. Titanic and the Saturn V Rocket at Johnson Space Center. Integral to the conservation is the removal of loose material, reduction in salts and corrosion, retention of coatings and desirable patina, and repair of damaged areas.