red lead or lead oxide (Pb3O4) - chemically resistant material, not soluble in water and sulfuric acid.It is best known as a high quality natural pigment orange or brick-red color, a part of the anti-corrosion primers and paints are widely used in the practice of masking.
Description
Surik lead (GOST 19151-73) is a heavy crystalline powder with a particle size from 2 to 10 microns, which is produced in the process of thermal oxidation litharge semi-finished and lead powder oxygen.The substance has a high density, it is a strong oxidant.The latter property and determines its scope as anticorrosive agents in the composition of the soil, caulking, paint, putty and so on. F. When entering minium reacted with the iron on a metal surface, a dense impenetrable oxide film that protects the treated surfaces of steel structures from corrosion.Produce it only in chemical plants.The substance is relatively toxic and, in accordance with Russian standards, related to the first class of danger, so it made on the basis of color "minium Lead" is prohibited for use in residential and public buildings.
Application
main purpose of lead pigment - providing high anticorrosive properties of paint formulations, which are used for metal structures and surfaces, including those damaged by rust or scale residues.These materials are widely used in shipbuilding for priming and painting the exterior surfaces exposed to salt water and atmospheric phenomena.Surik lead is not afraid of aggressive environments, has good adhesion, is an effective corrosion inhibitor.It can be used to create a protective and decorative coating of concrete and reinforced concrete structures.Additionally, the minium required for manufacturing lead batteries, and also in the manufacture of crystal glass and certain grades protective resistant to radiation and optical glass.In the chemical industry, it is the reagent in the preparation of acetates, carbonates and other lead compounds.Paste minium lead is the basis of persistent putties and plasters, which are used in the assembly of oil, steam and water pipelines.The practice of using said pigment to protect against gamma radiation, as well as for the manufacture of matches and some thermite explosives.
method of applying paint "Surik lead»
Before applying the paint should be thoroughly mixed and, if required, be diluted to the desired viscosity solvents: with solvent or mineral spirits.Can be used for this purpose and with a solvent mixture of toluene in a ratio of 1: 1.The surface to be color, must be cleaned and degreased.The finished paint, the temperature of which should not be below 15 ° C, should be applied in two layers with a brush, roller or spray gun.It should be borne and air temperature (5 to 35 degrees).To dry each layer is given for at least 2 hours.During dyeing minium should stir as often as possible to avoid settling of heavy particles of material to the bottom of the container.
packaging, storage and transport of pigment
Surik lead flasks packed in steel, wood or plastic barrels, plywood, steel or cardboard-wound drums, special soft disposable containers.Containers should be waterproof.Transported any means of transport in compliance with the rules of protection against ingress of atmospheric moisture.Store lead pigment packed in dry closed warehouses at -40 ° C ... + 40 ° C of not more than 1 year from the date of manufacture.Given that the minium Lead is toxic, during transportation and storage should follow the necessary safety measures.
