SU1679308A1 - Set of defectoscopic materials for colour flaw detection - Google Patents

Abstract

The invention relates to flaw detection materials for detecting surface defects in metal parts. The purpose of the invention is to improve the working conditions of the flaw detector, as well as to get rid of harmful dyes during color flaw detection, which pollutes wastewater. For this purpose, a set of flaw detection materials for color flaw detection, consisting of a penetrant of the composition, parts by weight: aqueous solution of nickel salt 1-50% - 100; sodium nitrite 1-2; isopropyl alcohol 2-8; aqueous ammonia solution to pH 8; water purifier, and composition model, parts by weight: ethyl alcohol 80-100; dimethylglyoxime 1-3; distilled water 0.1-100.0; enriched kaolin 30-60

Description

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This invention relates to flaw detection, in particular, flaw detection materials for color flaw detection, used in aircraft manufacturing, shipbuilding, turbine manufacturing, at nuclear power plants and other industries to detect surface defects in critical parts,

The aim of the invention is to improve the working conditions of the flaw detector, i.e. providing work with practically harmless, non-soiling clothes with materials, as well as reducing pollution of the ecological environment due to the appearance of color directly in the area of the defect.

The flaw detection kit, which includes penetrant, cleaner and developer, includes ingredients that react with each other with a change in color from light green, transparent to bright pink-red color, for which an aqueous solution of nickel and an aqueous solution of ammonia are introduced into the penetrant the following ratio of components, wt.h .: 1-50% aqueous solution of salt Nickel 100

Sodium Nitrate1-2

Isopropyl alcohol2-8

An aqueous solution of ammonia up to pH 8a in the producer is dimethylglyoxime in the following ratio of components, parts by weight. Ethyl alcohol80-100

Dimethylglyoxime1-3

Distilled water 0.1-100.0

Enriched kaolin 30-60,

and as the purifier use distilled water 100 wt.h,

Lenetrant is obtained by dissolving sodium nitrate in water at 50 ° C, adding any nickel salt and mixing XJ with

About 00

until complete dissolution, then isopropyl alcohol and ammonia solution are added with stirring to pH 8. Water is used as a purifier. The manufacturer is obtained by dissolving dimethylglyoxime in alcohol, then kaolin is added and mixed again, after which water is added with stirring,

In the case of color flaw detection, the cavity of the defects having an exit to the surface is filled with an indicator penetrant, then the excess penetrant from the surface is removed. After application of the developing composition and penetrant penetration from the cavities of the defect, the controlled surface is illuminated in daylight. The outgoing indicator penetrant gives an easily visible red image.

Example. Penetrant consisting of 100 mac. 64% nickel chloride solution; 1.5 wt.h. sodium nitrate; 5 wt.h. isopropyl alcohol and ammonia to pH 8, applied with a brush on a degreased controlled surface of the part. The holding time is 15–20 min. The excess penetrant is removed with a damp cotton cloth moistened with water, then dry. Then put the developer composition, wt.h .: ethyl alcohol 90; dimethylglyoxime 1.5; distilled water 50 enriched with kaolin 45. The color of the penetrant in defects changes from pale green to red due to the reaction to nickel cations (Chugaev reaction).

The detected defects have clearly defined boundaries, which facilitates the process of defectoscopy of the studied materials.

Claims (1)

DETAILED DESCRIPTION A flaw detection kit for color flaw detection, consisting of a penetrant containing sodium nitrite, a developer containing ethyl alcohol, water enriched with kaolin, and a cleaner containing water, characterized in that, in order to improve working conditions and reduce pollution ecological environment due to the appearance of color directly in the zone of the defect, an aqueous solution of nickel salt and aqueous solution of ammonia are introduced into the penetrant in the following ratio of components, parts by weight: 1-50% aqueous solution of nickel salt 100 Sodium nitrite 1-2 Isopropyl alcohol2-8 Aqueous solution of ammonia do pH 8 in the manufacturer - dimethylglyoxime in the following ratio of components, parts by weight: Ethyl alcohol 80-100 Dimethylglyoxime1-3 Distilled water 0.1-100 Enriched Kaolin 30-60 Distilled water was used as a purifier.