Acid-resistant coating

Granodixing Process, developed by the American Chemical Paint Co, Waterbury, Conn for rust prevention of iron, steel, zinc or cadmium consists in immersing the material in a hot soln of acid zinc phosphate. This operation forms an acid resistant coating. The resulting material may be painted... 

Why are pancreatin microspheres with acid-resistant coating usually more effective in reducing steatorrhea than identical lipase doses provided as either plain pancreatin powder or monolithic capsules or tablets with acid-resistant coating ... 

An important factor that should be taken into account while drying PVC is the corrosion of the equipment due to the monomer chloride. Monomer chloride, which is always present in the wet cake, induces pitting corrosion and stress corrosion cracking in parts where the powdery materials are processed. Those parts, therefore, are made of AISI-316L and are partially coated with an acid-resistant coating. It is indispensable to make periodic inspection of the corrosion condition and to make timely replacement of the necessary spare parts. Preventive maintenance is imperative to successful operation. 

A reservoir system consists of an active substance and a membrane, and therefore is also known as a membrane coti-trolled system. A membrane or coating can be applied to a whole tablet or capsule, or to a tablet core. Granulates and even crystals can be coated as well, which are then processed into tablets or capsules. Enteric-coated dosage forms have an acid-resistant coating, which dissolves when the pH is increased. An osmotic system may be regarded as a particular reservoir system, because it has a semi-permeable membrane that is provided with holes with an exact diameter. 

Material to be dried per tray. (Capacity of each tray as dry material in kilogram.) MOC of trays and internals. In case of evolution of acidic vapours, the inside should have acid-resistant coating of fibre reinforced plastic or special anti corrosive paint. 

Prior to construction of the adsorber vessel the inside and outside of the welded pipe should be coated with an acid-resistant coating such as a suitable epoxy. 

Industrial traction ceUs and old-style SLI cells have been connected into batteries after the cell cases and covers are sealed together. Traction batteries are needed in thousands of different sizes for various applications, and the standard unit of construction is a cell, not a quantity of plates and separators. A heavy steel tray is fabricated and coated with an acid-resistant coating (urethane, epoxy, etc.). Traction cells are placed into the tray and shimmed as necessary, and interceU connections are welded on. Heavy flexible wires (made from welding cable) are welded to the end cells for connection to the external circuit. 

One study found that thiosulfinates (e.g., allicin) were not formed below pH 3.6, thus alliinase is completely and irreversibly inhibited by stomach acid. A second (unidentified) enzyme, in addition to alliinase is involved in thiosulfinate formation. A stomach acid-resistant coating on garlic powder tablets is necessary for thiosulfinate release, which if prepared carefiilly can release amounts of total thiosulfinates similar to whole garlic cloves. ... 

Phenolic resin systems can also be utilized in mortars for acid resistant floor tiles or for acid resistant coatings for industrial laminates. The good chemical resistance of these resins makes them suitable for impregnating diverse filter systems with phenolic resin, e.g., for air, oil or gasoline filters in automotive construction or in... 

Paints, varnishes (acid-proof enamel, acid-resistant coatings, anti-oxidants and solvents, boat deck sealing compound, lacquers)... 

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