Owe pickling packaging steel strip surface characteristics and solving method

( 1) Defect features: the packaging steel strip surface transverse black stripes. With black float ash layer, similar & other; Your forehead & throughout; Horizontal lines, into strip or patchy distribution in the packaging steel strip surface. ( 2) Reasons (1) packaging tin oxide film on the surface of the steel strip pickling net, during cold rolling is pressed into the panel. (2) breaker machine operation is bad, make the sheet without fully loose, pickling effect. (3) inappropriate pickling process, such as acid concentration, low temperature, high ferrous, pickling time is short, fast speed, etc. (4) packing steel with large rocker, wave form or as the crimp tension too general packaging steel strip surface stretched out which are acid. 5. Local packaging steel strip surface oil pollution, hinder the acid etching. 6. Alloy steel, cold rolled material because of the compact structure of tin oxide from owe pickling. ( 3) To prevent and eliminate method (1) the correct breaker machine operation. Improve the effect of breaker. (2) adjust acid temperature, concentration, according to the situation of steel grade specifications and incoming strip shape control of pickling speed. ( 4) Check: check with the naked eye, according to the product of the specific circumstances, slight owe pickling can be jailed for high quality board of three groups, or national standard of ordinary plate products, general sentence in an ordinary plate products, particularly serious for the trash.