The different colors of the coating can be attributed to angstrom-level thickness variations across the surface.  All SilcoTek coatings have a thickness of <1.5µm.

You will get efficient and thoughtful service from LITONG.

Certain coating processes (e.g. Silcolloy, SilcoGuard) result in a thicker layer and have a silver/matte gray appearance, while thinner coatings (e.g. SilcoNert) exhibit the ‘rainbow’ colors.

In general, temperatures should not exceed the recommendations below in order to maintain the coatings' specified performance properties, but coated parts can be used at higher temperatures under certain conditions.  Heat treatment of parts at the application's temperature will ensure the best results if exceeding the temperature limits suggested below. Please contact technical support at 814-353- or by clicking here for additional information or to discuss your application.

SilcoTek® coatings are stable to the following temperatures in an inert atmosphere:
*The values below reflect limits of the coating material itself and assume that the base substrate is stable at these temperatures.

SilcoNert®  450 °C; 400 °C (oxidative atmosphere) SilcoNert®  720 °C Silcolloy® 800 °C SilcoGuard® 720 °C SilcoKlean® 450 °C (functionalization loss), 400 °C (oxidative atmosphere) Dursan® 500 °C; 450 °C (oxidative atmosphere) Dursox® 500 °C Notak® 300 °C

Click here to request a quotation for custom surface deactivation of sample pathway components, inlet liners, etc. Please forward a scaled drawing or photograph detailing the product to be treated. Upon receipt of this completed worksheet, SilcoTek's Technical Staff will contact you with a quotation, typically within 1 business day or less.

When you are ready to send items to SilcoTek for treatment, contact technical support at 814-353- or   to request a sales order number.

When submitting parts for treatment, remember that parts must be completely dissembled, and components that cannot withstand the high (400°C) temperatures associated with the process (rubber o-rings, brass, etc.) must be removed. Note that SilcoTek cannot assume liability for damaged parts due to process heat.

See your quote for specific disclaimers.

Yes! Our Dursan® coating is certified by NSF International and therefore FDA compliant. However, most people ask about "FDA approval," and that question needs a more thorough explanation:

The United States Food and Drug administration (FDA) does not formally "approve" coatings or other materials for food or bio/pharmaceutical contact. Rather, the FDA regulates coatings via the Code of Federal Regulations (CFR), specifically 21 CFR 175.300 which lists what raw materials are acceptable and unacceptable for the formulation of coatings. It is then up to the coating supplier to self-regulate to ensure that they are using raw materials that are acceptable.

According to the FDA, a coating must 1) pass the solvent extraction tests listed in 21 CFR 175.300, 2) contain no heavy metals, and 3) all coating components conform to the materials listed by the FDA in order to be compliant. Since these stipulations are also required for NSF/ANSI 51 certification and Dursan successfully meets these requirements, our coating is FDA compliant. With respect to pharmaceutical applications, our data suggest that Dursan® does not "alter the safety, identity, strength, quality, or purity of the drug product beyond the official or other established requirements" per 21 CFR 211.65.

Nevertheless, we strongly encourage customers to test the use of Dursan® in their specific application to verify that performance requirements are met and the customer's production processes and outputs can continue to meet FDA approval guidelines.

Absolutely!

SilcoTek can coat the internal and external metal pathways for most flow regulating and metering devices to enhance their inertness and provide corrosion resistance. In order to coat the surfaces, all valves, regulators, and flow meters should be dissembled and all seals or parts which cannot be exposed to temperatures of approximately 400°C must be removed.

Disassembly should only be performed by qualified personnel with the appropriate seal kits, tools, and training OR damage or failure to the device will occur. For these reasons, SilcoTek cannot take on the responsibility of disassembly or reassembly of any valve, regulator, or flow meter.

If you do not have the experience and parts necessary to dissemble these devices, we recommend that you get in touch with Swagelok, Parker, or your valve manufacturer and order the coating treatment directly from them.

SilcoTek has business relationships with most manufacturers and routinely coats the internal and external surfaces of valves, regulators, and flow meters for them. The manufacturer will send the parts prior to assembling to SilcoTek for coating and will assemble the parts at their factory under the guidance of their quality systems.

SilcoTek uses a variety of precision surface preparation techniques to ensure parts receive the highest quality coating.   Additional pre-cleaning by the customer is often unnecessary and at times can be detrimental to our coating process.

In order to provide the highest quality coating and fastest processing; notify SilcoTek of any prior chemical exposure (regardless of whether the part is new or used).

Chemicals like cutting oils, pickling acids, solvents, water based cleaning compounds or other hazardous or non hazardous chemicals may impact the coating process. Many times the customer's cleaning process or chemical exposure can be eliminated, saving the customer time and money.

No. Raw, uncoated parts must be specified such that the material meets NACE MRO175 / ISO standards when they are ordered from the manufacturer.  Coating parts that are not already compliant with nace MRO175 / ISO will not make them compliant under any circumstances.

However, if SilcoTek coats parts that are already compliant with NACE MR / ISO , then they will remain compliant after coating - we simply added onto the already-compliant material.

SilcoTek® can coat most parts including intricate precision components.  SilcoTek currently coats all parts at our facility in Bellefonte, PA which will require parts to be shipped to our facility and processed within a coating deposition process oven with a maximum size of 7'0" long x 5'0" wide x 7'6'' high.  Our technology is able to coat very intricate geometries used for precision components and is scalable to much larger sizes. Our current capabilities are outlined in the summary below and our team is always willing to discuss the possibilities of your application, even if it may seem outside our current dimensions.  Please contact our team to discuss possibilities for your application.

For more Coating aluminum coil for medical equipment(vi,ar,pl)information, please contact us. We will provide professional answers.

Part Size

• Largest overall part size: 2.032m x .76m ID (80in x 29.92in ID)   Note: Size may be larger, contact ourTechnical Service Team to discuss your application.

• Smallest part size: Approximately 1mm (0.039in). Contact us to discuss your application.

Tubing Capabilities

SilcoTek® offers two processes for coating tubes:

Coiled/Rolled Tubing  

• Coated internally-only 
• Maximum continuous length: 

• Maximum coil OD for tubing > 1/16" OD: 36"
• Maximum coil OD for tubing 1/16" OD or smaller: 18"
• Must be shipped on a metal spool or bound with metal wire.  No spools made of wood, plastic, or other flammable materials.

Straight Tubing Sticks  

• We're adding capacity to our tubing coating process!  We'll soon have the capability to coat straight tubing sticks up to 24 feet long. Contact our Technical Service Team to learn more.

Our current straight tube capability:

• Coated both internally and externally
• Maximum length: 80"

Dursan Tubing Limitations

• SilcoTek is not able to coat small diameter transfer lines.  Contact our Customer Service Team to discuss your small diameter tube application. 

Virtually all alloys of stainless steel, ceramic, and most glass materials can be treated. Some other metallic materials, such as nickel, brass, and copper, are incompatible with the 400+°C temperatures used in the process, and should not be treated. 

Note: carbon steel, F22 or similar carbon steel, is not recommended for coating in corrosion resistant applications.  Treated carbon steel may rust in corrosive environments.  Avoid corrosive environments when using treated carbon steel in inert sampling applications.

SilcoTek can coat aluminum substrates however there are limitations for components used in high stress applications.  Go to our aluminum coating page to learn more about aluminum coating capabilities.  Contact us to ensure optimal processing of your aluminum parts.

The color of a surface coating is an expression of the light diffraction qualities and thickness of the layer. The thickness of a SilcoNert layer determines the degree of darkness, secondary reflectivity, and/or final color of the item. The color can range from light golden-brown (thin coatings) to reflective silver (heavier coatings). We deposit a layer that provides a gold color on liners to aid analysts in inspecting for cleanliness. Chromatographic performance does not depend on the thickness of the layer.

SPECIAL NOTE: Coating of glass fritted liners - SilcoTek would prefer that all glass liners be sent without deactivation (e.g. silanization) since the deactivation layer will prevent our intermolecular coatings from bonding to the surface. For most glass liners, our cleaning process will remove all prior deactivants. However, SilcoTek cannot put fritted liners through our cleaning process without damaging the frit.

Fritted liners are special because there is no effective way of cleaning glass frits or stripping the coating in case of failure. As we continue to gain experience with glass frits and tailor our processes, we will get better. Our major hurdle is being able to "test" fritted liners prior to coating to ensure they are clean. We continue to work on this aspect of our operation.

We recommend all end users test SilcoTek coatings in corrosive applications to better understand the performance and potential lifetime prior to installing coated parts into service.  Since every corrosive application is different, several factors impact the coating's lifetime, and there are potential risks associated with failure, it is nearly impossible for us to provide a realistic estimation.

Our goal at SilcoTek is to partner with you to help you solve your corrosion problems, so we put a priority on helping you evaluate our coatings.  This includes gathering relevant test data, providing samples, coating your test pieces, and putting our technical experts on your project to find a solution that works.  Please contact us to discuss your application and establish a testing and validation plan.

Yes!  Our unique chemical vapor deposition process is performed in the gas phase, so even the smallest channels and tightest tolerances will be adequately coated along with the rest of the part.  We also have the ability to coat certain tube configurations internally-only.

We proved this by coating a 1/16" OD, .4mm ID tube with multiple bends both internally and externally.  After coating, the tube was cut open to examine the coating at the center-most point inside the tube.  In addition to the external coating on the tube, a quick visual inspection shows the vibrant purple-colored SilcoTek coating inside the narrow bore.  

The thickness of the coating throughout the tube was verified by aFilmetrics F40-Series Thin Film Analyzer and it was confirmed to meet our specifications.  SilcoTek coatings are not applied with line-of-sight processes that lead to inconsistent deposition and uncoated areas.  With our process, 100% of your parts are coated, even if the design is complex or the pathways are tortuous.

UAC™ Tradition of Quality

Manufacturing Custom Rolled®
Aluminum Coil since .

Ship on time; ship the quality of goods agreed upon; make every transaction merit a repeat order. This is the spirit that pervades our organization. Whether you order a pound or a carload, you are entitled to service, the quickest possible shipment and above all – United Quality.

We wrote these words in and remain true to this philosophy. Our passion for customer satisfaction led us to become the first general purpose aluminum rolling mill in North America to receive ISO registration.

United Aluminum’s rolling mills in . United Aluminum began as a scrap and smelting company in and started rolling aluminum in , making it the second oldest aluminum roller in America today.

Today… United Aluminum’s state-of-the art Sendzimir rolling mills deliver the closest, most uniform gauge control to ensure that your production runs are smooth and profitable.

ISO - Certificate

The first general purpose aluminum rolling mill in the United States to receive ISO registration is now certified to the expanded : standards.

ISO : is an internationally recognized set of standards for a Quality Management System against which United Aluminum Corporation has been measured and certified.

As a requirement to maintain certification, United Aluminum must successfully undergo rigorous third party audits yearly in addition to our own internal audits to ensure continued compliance with the standard.

Want more information on color coated aluminum coil supplier? Feel free to contact us.

Plant Tour

Tradition of Quality

Our state-of-the-art aluminum coil facility in North Haven CT has seen many expansions over the years, adding new aluminum rolling capacity and expanding our raw material storage, slitting, and annealing capacities to make sure we can meet your delivery needs. Some of the most innovative aluminum coil processing technology in the World can be found here, proudly developed by our talented team.

Custom Rolled® Aluminum Coil

United Aluminum's Sendzimir Mills (Z-Mills) are a marvel of technology, innovation, and engineering experience. They produce the most consistent rolled aluminum gauge possible to the most exacting tolerances. United never stops improving our mills, finding ways to make even the best rolled aluminum coils in the industry even better. Our typical Z-Mill finish is brighter than a conventional 4-hi mill without extra cost. The Z-Mill is also capable of matching your mill finish. Ask us about rolled aluminum coil finish options.

Consistent Gauge Control

Here we can see a typical gauge distribution between aluminum coils rolled on a typical 4-hi mill versus the uniform gauge produced from United Aluminum's Sendzimir rolling mill. More consistent gauge end-to-end, coil-to-coil, and order to order means that you need fewer adjustments to run your equipment at high speed, and less setup between aluminum coils and orders.

Custom Slitting

United Aluminum has industry leading slitting, and some of the most talented aluminum coil slitting experts in the business. We can offer very tight width tolerances, specific coil OD ranges, large OD's up to 76”, and a variety of coil ID sizes and fiber or aluminum core types, as well as strippable plastic coating.

Custom Annealing

United Aluminum has annealing capacity designed to let us anneal aluminum coils in slit form for the most demanding forming applications. Our ability to design and control a very specific production process designed to meet your forming needs means you can expect the best results possible from UAC Custom Rolled® Aluminum Coil.

Full Metallurgical Staff

Our in-house full metallurgical Staff is available to assist with your questions and here to consult with for any rolled aluminum coil project you may have. Our fully equipped testing facility allows us to carefully monitor the quality and properties of every order. Our technical team is available for consultation by or , or we are happy to come to you. Let us help with your next aluminum project by providing trials or samples.

Large or Small Orders

One of the most unique things about United Aluminum is our ability to produce any size order. We are ready to help you with trials and small orders, but we are capable of producing truckloads or more with the same quality and reliability we have become known since . Don't order minimums you don't really need. Discuss your aluminum coil requirements with United Aluminum.

FAST On-Time Worldwide Delivery

United Aluminum makes delivery promises we can keep. For over a decade United has mantained an on-time shipment rating exceeding 98%. That means you can count on your material when you expect it. United Aluminum also has the ability to custom package your rolled aluminum coils for domestic, LTL, container or even air shipment with special packaging, spacers, even full boxing. Inquire about your special packaging and delivery needs.

Assured Supply

United Aluminum has an extensive selection of alloys for your aluminum coil projects, and our impressive inventory and fast delivery means you can reduce the amount of safety stock or inventory you manage, and let us deliver what you need, when you need it.

Custom Service

United's Customer Service team is dedicated to making your aluminum coil ordering experience convenient, and we stand ready to answer any question you have. We have real-time production information on your order and make every effort to fulfill your quote requests as quickly as possible. Contact our sales team at 800-243- or by at