Silcolloy

• Silcolloy 1000 (Silcosteel-CR): A corrosion resistant layer that increases the lifetime of system components in acidic environments containing hydrochloric acid, nitric acid, or seawater.

Silcolloy treatment extends the lifetime of steel and steel alloy systems. High temperature capability and leak-free sealing capability make it an ideal treatment for:

• process tubing, fittings, valves, and reactors
• gas transfer and delivery systems
• nozzles
• stack gas monitors
• analytical testing equipment in harsh environments

Methods available to control industrial corrosion are limited to corrosion-resistant alloys, barrier coatings, cathodic protection, and corrosion inhibitors. When properly applied, each method can be effective in slowing corrosion, but each has limitations as well. For example, some coatings are inexpensive, but require rigorous inspection and/or frequent reapplication. Corrosion-resistant alloys can provide exceptional protection, but can be prohibitively expensive. Some alloys require significant process redesign, increase operating cost, or generate hazardous waste.

Silcolloy 1000 is a proprietary (U.S. Patent #7,070,833), multilayer silicon, chemical vapor-deposited (CVD) coating, specifically designed to improve the corrosion resistance of steel, stainless steel, alloys, glass, and ceramics. The unique non line-of-sight CVD process produces a flexible amorphous silicon layer that diffuses into the metal lattice. The layer will conform to the most intricate surface while maintaining high dimensional tolerances. Silcolloy 1000 will deform with tubing surfaces, allowing leak-free seals or radius bends.

Independent Laboratory Testing
Silcolloy 1000 offers an order of magnitude or more improvement in corrosion resistance relative to existing processes.

Corrosion testing of Silcolloy 1000 treated 316L stainless steel and untreated 316L steel according to ASTM G 48, Method B2 (72-hour ferric chloride pitting and crevice corrosion testing), shows corrosion of the treated stainless steel is reduced by an order of magnitude, as measured by weight loss (Figures 1 and 2).1

Testing of Silcolloy 1000 treated coupons in neutral, acidic, and basic chloride solutions, according to ASTM G 61,1 show Silcolloy 1000 treatment reduces corrosion rates by an impressive 50x, compared to untreated 316L stainless steel.

Improved Performance in Marine or Acidic Environments
Silcolloy 1000 treatment is effective in acidic or salt corrosive environments, in which the user demands extended service life for an existing process without using high-priced alloys. 4000-hour salt spray testing (salt spray accelerated weathering test ASTM B117) shows Silcolloy 1000 treated stainless steel coupons exhibit no surface corrosion, while untreated coupons show surface corrosion and accelerated corrosion at the coupon hole (Figure 4). Neither coupon developed pitting over the test period.1

Save Thousands with Silcolloy!
Estimated lifetime cost savings of a typical process system show Silcolloy treated sample lines, fittings and valves will save the user hundreds of thousands of dollars. While the initial cost of an unprotected stainless steel system is lower than a comparable Silcolloy 1000 treated system, the overall lifetime cost, considering replacement cost due to corrosion is nearly double that of a Silcolloy 1000 treated system (see figure 5). Conversely, high performance alloy systems offer superlative corrosion performance, but the initial material cost can be up to six times higher than a comparable stainless steel system.

References

1. M. Zamanzadeh; G. Bayer; G. Rhodes; D. Smith; M. Higgins; Laboratory Corrosion Testing of a Chemical Vapor Deposited Amorphous Silicon Coating; Matco Associates, Inc. Pittsburgh, PA; SilcoTek Corporation, Bellefonte, PA. 2005

SilcoTek offers treatments on a custom basis direct from our facility. Just follow 2 easy steps to maximize the performance of your product!

Step 1 - Get a quote!
We make it easy with quote options to fit your needs visit our website at www.SilcoTek.com and complete our on-line quote request form or fax your quote request to Quotes at 814.353.1697 or e-mail it to Silcod@SilcoTek.com. We’ll get a quote out to you within 24 hours!
Step 2 - Send in your parts!
Mailing instructions, shipping labels and a service number will be forwarded to you along with your quotation. Box up your parts and send them to us. Your order will be processed in 10 working days or less.