Solvent-free epoxy coating for inner lining of nuclear-power desalting water tank and preparation method thereof

Abstract

The invention relates to an epoxy coating, and particularly relates to a solvent-free epoxy coating for an inner lining of a nuclear-power desalting water tank and a preparation method thereof. The epoxy coating is prepared from main paint and a curing component, wherein the volume ratio of the main paint to the curing component is 1 to (1 to 2); the viscosity of the main paint and the curing component is differed for 200mpas at most; the main paint is prepared from the following components in parts by volume: 40 to 70 parts of epoxy resin, 0 to 10 parts of active diluting agent, 1 to 3 partsof pigment, 2 to 6 parts of additive, 25 to 35 parts of functional filler and 5 to 15 parts of mica powder; the curing component is prepared from the following components: 30 to 55 parts of amine curing agent, 5 to 15 parts of active diluting agent, 2 to 6 parts of additive, 0.2 to 1.5 parts of polyamide wax, 5 to 10 parts of silica modified kaolin, 0 to 15 parts of functional filler B, 7 to 15 parts of zinc aluminium tripolyphosphate and 7 to 10 parts of talcum powder. The epoxy coating provided by the invention is wide in construction temperature range, can be used for normal construction at5 to 40 DEG C and is difficult in sagging; risks of disadvantages of a pinhole and the like are minimized; the anticorrosion performance is better; primer does not need to be sealed; the constructionamount is decreased and moreover, the solvent-free epoxy coating does not contain a volatile solvent and is environmentally friendly and high-efficiency.

Description

technical field [0001] The invention relates to an epoxy paint, in particular to a solvent-free epoxy paint for lining a nuclear power desalination tank and a preparation method thereof. Background technique [0002] Epoxy coatings have the characteristics of strong adhesion, excellent chemical corrosion resistance and radiation resistance, so they are widely used in the field of anti-corrosion coatings industry, especially in the field of nuclear power. At present, the lining coating of nuclear power desalination tanks belongs to PLD coating, the material is carbon steel sandblasting treatment, and the use environment is long-term contact with desalination water. There are mainly two systems currently in use, and the main paint is still dominant. One is without Solvent epoxy, this coating is LP100 / 512 from a French company. The construction conditions of this coating are harsh, and the construction environment is required to be 10-30 ° C. When it is sprayed by high-pressure...

AI Technical Summary

Problems solved by technology

At present, the lining coating of nuclear power desalination tanks belongs to PLD coating, the material is carbon steel sandblasting treatment, and the use environment is long-term contact with desalination water. There are mainly two systems currently in use, and the main paint is still dominant. One is without Solvent epoxy, this coating is LP100 / 512 from a French company. The construction conditions of this coating are harsh, and the construction environment is required to be 10-30 ° C. When it is sprayed by high-pressure airless spraying, it is prone to defects such as sagging and pinholes.

[0003] The other system is the polyurea system. This coating is Stuff 120 from the United Laminate Coatings Company of the United States. Although the construction conditions of this coating are broad, the construction equipment is expensive, and it is prone to blisters, pinholes and other disadvantages.

And in the field of long-term anti-corrosion, it is not as good as the anti-corrosion performance of solvent-free epoxy, especially after the salt spray, the adhesion is much lower than that of epoxy

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