Multicomponent spray coating

Multicomponent spray coating. Multicomponent spray coating equipment (30 to 70% TE) is used for applying fast-curing coating system components simultaneously. Since they can be either hydraulic or air-atomizing, their transfer efficiencies vary from low to medium. They have two or more sets of supply and metering pumps to transport components to a common spray head. 

Corrosion occurs when all components of the process are present and capable of reaction (see preceding section). Basic test conditions include exposure of the coatings systems to an electrolyte containing reducible species (typically oxygen or hydrogen ion). More sophisticated testing would include closely replicating known corrosive conditions such as wet/dry cycles and multicomponent and multiphase chemical environments. Immersion, salt spray, and a partial pressure of sulfur dioxide corrosion tests correspond to water tank, marine, and combustion exhaust service environments, respectively. An important relationship exists between the corrosive environment used in the test procedures and the product s intended service use. 

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