Through analyze the market characteristic of leather chemicals and the management state of medium and small-scale leather chemical company as well as it faces situation at present in our country, and put forward the counter-measure and management direction to the development of the business company.

Genesis and Countermeasures of Hot Rolled Strip Steel Scale;

Improvement of Pickling Quality of SPHC Hot Rolled Strip Scale at Meigang;

Preventing of Scale Defect Formation of Hot Rolled Coil Using Quality Management Method;

The microstructure of iron oxide scales,as one of the essential factors,is important to pickling quality of the hot rolled strips.

With the utilization of the X-ray diffractometer and scanning electron microscope in the iron oxide scale on the surface of the steel sheet.

The detection of chemical composition,physical property,metallurgical structure,surface iron oxide scale of the products leads to quantified performance index differences,which helps identify the means to improve product quality.

The causes of difficult pickling of oxide scale of SPHC hot rolled strip were analyzed from chemical composition of strip,thickness of oxide scale,roughness of interfacial between oxide scale and strip,pickling technology,etc.

The results showed,the black spots are in fact the oxide scale formed during hot rolling and remained after pickling;the black spots are primarily composed from Fe3O4 and FeO;and the higher the temperature,the thicker the scale is,the higher .

At the same time,the effect of the oxide scale on the heat transfer was also discussed.

Cleaner production of pickling for iron-steel parts with oxide scale;

Effect of temperature on hydrogen gas reduction of oxide scale on carbon steel;

Corrosion behavior and structure of oxide scales formed on hot rolled strips after coiling with different oxygen supplies