Steel pickling is part of the finishing process in the production of certain steel products in which oxide and scale are removed from the surface of strip steel, steel wire, and some other forms of steel, by dissolution in acid. A solution of either hydrogen chloride (HCl) or sulphuric acid is generally used to treat carbon steel products, while a combination of hydrofluoric and nitric acids is often used for stainless steel. Steel pickling and the associated process of acid regeneration result in the emission of hazardous air pollutants (HAPs). STEEL PICKLING During the hot rolling or heat treating of steel, oxygen from the atmosphere reacts with the iron in the surface of the steel to form a crust that is made up of a mixture of iron oxides. The presence of oxide (or scale) on the surface of the steel is objectionable when the steel is to be subsequently shaped or cold-rolled and coated. Numerous methods have been used to remove iron oxides from metal surfaces. These method
Post Covid - 19 crisis customers have changed interaction dynamics with suppliers and the mechanism of face to face discussion with displays /catalogues /data and assessment of compliance, clarity and creation of trust has disappeared. Customers are now providing details digitally including virtual plant visit, web meeting on clarification on requirement including negotiation meeting and finalization of requirements. There is substantial savings of time and resource cost however, things are not happening that fast as it reads. Industrial products options are varied to a large extent and the process of trust on supplier and the preferred option is not simple. In B2B sales in the past sales expert’s skill on complete understanding from end user on personal visit to application location used to be similar to a physician checking a patient with stethoscope. No matter the help of technology and latest digital media - the thread of understanding is missing today. There used to be a diffe