Chemical agent resistant coating

Table 1-4. Chemical agent persistency in hours on chemical agent resistant coated painted surfaces. ...

Use of paint that provides little corrosion protection, such as the chemical agent-resistant coatings that deteriorate rapidly in the presence of a corrosive environment. 

Chemical agent-resistant coatings (CARC) consist of a surface cleaning, epoxy primer, epoxy interior topcoat, and a polyurethane exterior top coat. The purpose of this coating was to provide resistance to chemical penetration of the coating and to aid in decontamination of the vehicle in case of chemical attack. Other purposes of the coating were to provide corrosion protection as well as camouflage protection. 

Microelectronic circuits for communications. Controlled permeability films for drug delivery systems. Protein-specific sensors for the monitoring of biochemical processes. Catalysts for the production of fuels and chemicals. Optical coatings for window glass. Electrodes for batteries and fuel cells. Corrosion-resistant coatings for the protection of metals and ceramics. Surface active agents, or surfactants, for use in tertiary oil recovery and the production of polymers, paper, textiles, agricultural chemicals, and cement. 

J. Silver. Silver (mp 961 °C), has the highest electrical and thermal conductivity of any metal. It is used in making electrical contacts and in the construction of some laboratory ware. It is easily electrodeposited, and both chemical and evaporation coating with silver are possible. Silver is generally less resistant to attack by oxidizing agents than is platinum or gold. However, it is resistant to fused alkalies and fused alkali-peroxide mixtures. Therefore, it is used to make... 

A most important development in the modem paint and varnish industry has been the introduction of synthetic resins as replacements for natural resins in the manufacture of varnishes and enamels. By using synthetic resins it has been possible to produce a variety of coatings that, in many cases, have important points of superiority over any of those compounded from natural resins. The synthetic vehicles are particularly distinguished by their hardness and durability and their high degree of resistance to the action of water, alkalies, and other chemical agents. 

Strontium chromate is used in the following applications as a pigment, as an anticorrosive agent in aluminum and magnesium alloys, in vinyl sheeting, and in chemical-resistant coatings. 

On account of their paraffinic nature, polyethylene coatings are highly resistant to chemicals. They are, however, attacked by strong oxidizing agents. Polyethylene coatings are elastically tough, flexible (even at low temperature), resistant to hot water, and nontoxic. 

Uses Epoxy curing agent for two-component ambient-cure chemically resist, coatings... 

This discussion of chemical stability refers to bare (uncoated) glass fibers, i.e., fibers having neither a specific acid or alkali resistant finish nor a secondary coating. Accordingly, the relationship between fiber composition and chemical stability in water, acids, and bases is complex. It depends on the interaction between (1) the chemical agent [27] to which the glass fiber surface is exposed, (2) foe pH of the glass composition [33] in the fiber surface, and (3) the internal microstructure of foe fiber [27]. 

In summary, the effect on the pH of the bare fiber surface and the effect of the interaction between a chemical agent and a bare fiber surface are predictable. ZrC>2 seems to increase both acid and base resistance. The effect of the internal microstructure [27] of a fiber is highly process dependent and not predictable without a thorough prior investigation of its microstructure. Importantly however, all fibers, except experimental single fibers, have a primary finish some have an additional secondary coating. These modifications further reduce the predictability of their chemical resistance from their compositional make-up alone. 

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