Steel product acid dipping test erosion integration device

Abstract

The invention discloses a steel product macroscopic examination device. A steel product acid dipping test erosion integration device comprises a compressed air source, a vapor source, a tap water source, an acid liquor preheating circulating system, an acid dipping test circulating system, an acid fog neutralizing tower, a rinse tank and a waste liquid tank , wherein the acid liquor preheating circulating system comprises an acid liquor preheating tank and a graphite heat exchanger which are successively connected, and the graphite heat exchanger returns to the acid liquor preheating tank through an acid buffer pool and an acid returning middle tank; the acid dipping test circulating system shares each device of an acid liquor preheating system and a pickling tank is arranged between the graphite heat exchanger and the acid liquor buffer pool, and the compressed air source can control pneumatic valves at the acid liquor inlet and acid liquor outlet of the pickling tank through a pneumatic control box; the acid fog neutralizing tower is controlled by an electric control cabinet and is connected with the pickling tank, the tap water source is connected with the cold water inlet of the rinse tank and is simultaneously connected in parallel with a water heater and is connected with the hot water inlet of the rinse tank; and the outlets of the rinse tank and the pickling tank are respectively connected with a waste liquid storage tank. The steel product macroscopic examination device provided by the invention has the advantages that the heating speed is rapid and uniform, and the acid concentration is unaffected.

Description

technical field [0001] The invention relates to a low-magnification inspection device for steel, in particular to a corrosion device for acid leaching test of steel or billet. Background technique [0002] The full name of low-magnification inspection: macroscopic inspection of metallographic structure and defects of steel (billet). Because it is an inspection method used with the naked eye or a magnifying glass no greater than ten times, it is generally referred to as low-magnification inspection in daily life. Commonly used methods for low-magnification inspection include acid leaching test, sulfur printing inspection, phosphor printing inspection, fracture inspection, and turning tower-shaped hairline inspection. Acid leaching test is the most widely used and most important method. [0003] According to the national standard GB226-97, three conditions need to be guaranteed for low-magnification sample corrosion: acid solution temperature (60-80°C), acid solution concentr...

AI Technical Summary

Problems solved by technology

[0006] Materials with good thermal conductivity are not acid-resistant, and acid-resistant materials have poor thermal conductivity. Quartz glass is a better material that meets both thermal conductivity and acid resistance, but it is very brittle, not durable, and difficult to make (molding), poor processability, and finished products. more expensive;

[0007] All electrical interface parts must be well sealed, because in the pickling room, the existence of acid mist is inevitable. Once the sealing is not good, the electrical interface will be corroded, which will cause short circuit of the equipment;

[0008] Slow and uneven heating;

[0009] And steam heating will reduce the concentration of the acid

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