Feb 2, 2012
In a world where international trade is routine, American dairy processors are not allowed the same economic advantages as their sister plants in Europe. Factories producing identical products on two continents find that American dairy plants are required to operate with CIP devices that consume twice the amount of water to operate, and often take much longer to complete a CIP cycle. This creates a financial disadvantage for US dairy processors. American dairy processors adhere...
Jan 7, 2012
Is electropolishing actually necessary given that a 1.0 or greater Cr/Fe ratio can be achieved by passivation alone? The real question is, “Are we trying to only passivate the surface or are we trying to produce a corrosion resistant cleanable surface?” Chemical passivation will attain a chrome to iron ratio above 1.0 (Cr/Fe), without producing any measureable change in the finish characteristics of the surface. Electropolishing is designed to remove surface damage from mechanical polishing and produce a more cleanable, featureless, smooth surface finish. The need to electropolish a surface is dependent upon...
Dec 11, 2011
Is electropolishing actually necessary given that a 1.0 or greater Cr/Fe ratio can be achieved by passivation alone? The short answer? If a 1.0 Cr/Fe ratio is all you are trying to achieve, no it is not. Now for the long answer. First, the 1.0 or greater Cr/Fe ratio indicated in the ASME BPE standard is a minimal requirement. The best passive and corrosion-resistant surfaces will have a Cr/Fe ratio in excess of 1.5/1, again achievable by passivation alone. The pharmaceutical industry, in most cases, requires a 15-25Ra value typically achieved through a mechanical polishing procedure. It is this procedure that, in my opinion, causes many of the problems experienced today with the formation of the “gray residue” and Class 1 rouge that has plagued end users for years.
Nov 30, 2011
High temperatures, low pH, and aggressive chemicals call for a material that exhibits the high corrosion resistance that traditional stainless steel alloys fail to attain. There are many alloys available to address the corrosion issues; but what makes super-austenitic stainless steel alloy AL-6XN® and nickel alloy C-22 the favorite materials for highly corrosive environments? Are the properties more attractive, or is the availability of the material in the required forms more desirable? Is one better than the other? Both AL-6XN and C-22 have a face-centered cubic lattice structure and contain...
Nov 11, 2011
In most recent years, the one technology that has had the largest impact on improving the efficiency of cleaning is tank cleaning equipment. In most cases, if you are going to make gains in one area you must make sacrifices in another. It is rare to find technology that allows you to increase efficiency in both time, energy, and resources. The newest equipment cleaning devices provide just that.
Nov 1, 2011
Welding AL-6XN is a very similar process to welding other stainless steels, but there is one very important exception. This alloy requires an additional alloy to be consumed in the weld. The following video outlines these and other instructions for welding AL-6XN successfully.
