JPS61170575A - Material for surface preparation for lining of steel material, steel structure or the like and surface preparation method for lining using such material - Google Patents

Abstract

PURPOSE:To form an excellent surface for lining on the surface of an iron or steel member by adhering a non-woven fabric impregnated with a liquid chemical for surface treatment consisting essentially of a mineral acid and phosphoric acid onto the surface of said member. CONSTITUTION:The liquid chemical for treatment prepd. by contg. 5-20pts mineral acid such as hydrochloric acid, sulfuric acid or nitric acid and 1-2pts phosphoric acid and adding a surface active agent and thickener such as synthetic glue and inorg. powder therein is impregnated to the non-woven fabric consisting of synthetic fibers such as polyester, natural fiber such as cotton or man-made fibers such as rayon and such non-woven fabrics are laminated to >=2 layers. A non-water evaporating layer consisting of PE, etc., is formed on one side of the laminated fabric. Such fabric with the non-water evaporating layer faced on the outside is adhered to the surface of the iron or steel material having a black skin on the surface in the stage of lining the surface of said iron or steel member is removed by the mineral acid and the surface is etched adequately by the phosphoric acid, by which the surface is treated to have the excellent lining treatability.

Description

[Detailed Description of the Invention] "Object of the Invention" [Industrial Application Field] The present invention provides a simple material for improving the adhesion of a lining material when lining the surface of a steel material or steel structure. The present invention proposes a lining base adjustment method using the same, and aims to improve the aesthetic appearance of steel materials, steel structures, etc., and increase their durability.

[Conventional technology]

Up until now, when adjusting the lining base of steel materials and steel structures, the black scale has been removed by mechanical means such as disk sander, sand blasting, etc., and then it has been roughly soaked in water or roughened again by mechanical means. In fact, an anchor coat was applied to improve the adhesion of the lining material.

[The problem that the invention attempts to solve]

However, when conventional methods first employ mechanical means such as disk blasting and dry blasting to remove black scale, there are many problems with occupational safety and health on site due to the generation of noise and dust. In the past, a method of applying an anchor coat to the lining area after mechanical removal of black scale to improve adhesion has been seen, but this method is a physical method of mechanical black scale removal and an anchor coat. Since it is used in combination with the chemical method of coating, it requires two steps and requires no surface preparation.
The drawback was that it required professionals from different fields.

"Structure of the Invention" [Means for Solving the Problems] As shown in claim 1, the material for surface treatment of steel materials, steel structures, etc. of the present invention comprises a chemical solution for surface treatment and a chemical solution thereof. It consists of an impregnated cloth for impregnation and adhesion, and the chemical solution is a mineral acid, i.e., hydrochloric acid, sulfuric acid, nitric acid, etc., or a mixture of 2 m or more, a surfactant, phosphoric acid, and, if necessary, a synthetic glue.
Thickeners such as inorganic powders are added and mixed to impart appropriate viscosity to the composition and to improve slow evaporation and adhesion to objects.The impregnated cloth has two or more layers. A water-inhibiting layer is formed on one surface of a water-absorbing nonwoven fabric that is laminated to a water-absorbing nonwoven fabric, and a set of the two forms a material for surface treatment of steel materials and steel structures.

The method of using this set of materials is as described in claim 2, in which an impregnated cloth is immersed in a treatment chemical solution placed in a suitable acid-resistant container to be impregnated with the chemical solution. This method is used to attach a water non-transpiration layer to the outside of steel materials and steel structures that require finishing and treatment.

[For production]

When a cloth impregnated with a chemical solution is attached to the surface of a steel structure, the reaction between mineral acid and iron proceeds rapidly and effectively, and after the mineral acid is consumed by the reaction with iron, phosphoric acid is released onto the surface of the steel structure. Then, appropriate etching is performed to form an easily adhesive layer. After peeling off the impregnated cloth, neutralize the surface with an alkaline substance such as soda ash to remove any remaining free acid, and then apply a lining such as painting or laminating to the surface.
A durable lining can be easily formed, so if you are attaching an impregnated cloth to the ceiling, or if there is a risk that the attached cloth will fall off due to ventilation or impact, apply an appropriate additional layer as necessary. Adhesion is preferably improved by adding a sticky agent.

The amount of diffusion agent in the drug solution of the present invention ranges from 5 parts to 20 parts by weight.
parts, preferably around 10 parts by weight, and the amount of phosphoric acid is α1 parts to 2 parts by weight, preferably tr1 parts by weight.
Approximately 1 part by weight is suitable.

The surfactant contained in this chemical solution has the effect of diffusing oil adhering to the steel surface into the chemical solution and increasing the adhesion of the chemical solution to the target object, and has a different ionicity from the chemical solution. also has the effect of imparting a certain degree of viscosity to the drug solution.

The phosphoric acid mixed forms a phosphoric acid film on the exposed iron surface by the reaction between the mineral acid and black scale, and has a slight etching effect on the base material. It is assumed that the added surfactant effectively facilitates the formation of an effective phosphoric acid film by the transfer of phosphoric acid to the iron surface, but the detailed form of transfer is not yet known. However, it is currently being clarified.

The chemical liquid impregnated cloth that is dipped in the chemical liquid to be impregnated with the chemical liquid is a nonwoven fabric made of synthetic fibers such as polyester, nylon, and vinylon, natural fibers such as cotton and hemp, and man-made fibers such as cotton and rayon. The reason why two or more layers of water-absorbent nonwoven fabric are laminated in particular is that a laminated fabric of two or more layers has better water retention and lower evaporation than a nonwoven fabric with only one layer. They found that by making the angles perpendicular to each other, the water retention capacity was higher and the degree of evaporation was lower.

The water non-transpiration layer formed on one surface of the nonwoven fabric to prevent evaporation of the chemical solution may be formed by fusing polyethylene, polypropylene, polyester film, etc., or may be formed by applying various synthetic resin liquids to form a film. It's okay.

[Example 1] A chemical solution having the following composition in parts by weight was prepared, and a polyester nonwoven fabric, a rayon nonwoven fabric, and a polyester nonwoven fabric each having a thickness of 2 m, into which a polyethylene film was fused as a water non-transpiration layer, were prepared so that the fiber flows were perpendicular to each other. Width 2 laminated in 3 layers so that
A long roll of water-absorbing non-woven fabric of 00 gourd is soaked to impregnate and adhere to the chemical solution [Prescription] Salt! ! ! io! Microgranulated anhydrous ricinica 2 [Product name: Erosil Zui 300] Surfactant α2 [Product name: Emulgen 120] Phosphoric acid α7 water
8a7 When this drug solution-impregnated cloth was applied to a steel material having a black scale and an H-shaped cross section, all of the black scale in the corresponding area was removed after one hour. After neutralizing the removed surface by wiping it with a wet rag with soda ash on it, the surface was painted with zinc rich paint.

After drying, vinyl chloride or acrylic acid ester vinyl paint was applied to the surface, and then the light was measured for L000 hours using a solar weather meter. t (15 minutes per hour of water spray), but there was no rust or cracks.
There was no discoloration at all ◇ On the other hand, when the black scale on the steel was removed with a disc sander and then similar zinc-rich paint or vinyl paint was applied, numerous spots of rust appeared on the surface ◎ [Effects] As described above, the material for lining surface treatment of steel materials, steel structures, etc. in which the chemical solution of the present invention and the cloth for chemical solution impregnation are set can easily remove black scale and form a phosphoric acid film on steel structures. The surfactant and phosphoric acid added together with the mineral acid effectively form a phosphoric acid film, improving the adhesion and durability of the lining material that is coated with paint later. .

In addition, the thickener, which is added as necessary, imparts a viscosity rich in chikunthrobic properties to the chemical solution, improving adhesion and suppressing evaporation. Since it does not seep or drip, it can be used in all positions, such as facing upwards, downwards, and vertically, and it greatly contributes to labor saving, strength, and durability improvement in the construction of steel materials and steel structures. .

Mura Kami Katsutori patent originator Katsuhiko Imai

Claims (2)

[Claims] (1) A chemical solution for conditioning the lining base of steel materials, steel structures, etc., which is mainly composed of mineral acid, phosphoric acid, and a surfactant, and if necessary, a thickener such as a synthetic glue or inorganic powder is added and mixed; A steel material or a steel structure comprising a cloth for impregnating a chemical liquid with a water non-transpiration layer formed on one surface of a water-absorbing nonwoven fabric laminated in two or more layers to be immersed in the chemical liquid to impregnate and adhere the chemical liquid. Materials for adjusting the lining base, etc. (2) The cloth for impregnating the chemical liquid as set forth in claim 1 is dipped in the chemical liquid for conditioning the lining base of steel materials, steel structures, etc. as set forth in claim 1. After impregnating and adhering it to the surface of steel materials, steel structures, etc., it is applied to the surface of steel materials, steel structures, etc. with the water non-transpiration layer on the outside. A method for adjusting the lining base of steel materials, steel structures, etc., characterized by forming etching.