Coating Recommended Care, Cleaning & Handling
Recommended Care of Treatment Layers
Since 1987, the SilcoTek® Team has been offering leading edge passivation and barrier coating technology to the scientific, analytical, and process markets. You may have questions regarding the appearance, performance, and maintenance of the treated surface. Here are a few tips to keep your treated products working at peak performance.
Layer appearance and surface finish can vary from lot to lot. Small variations in surface thickness (measured in angstroms) can impact layer appearance. The surface finish should be bright and free of defects, but original surface condition can have a major impact on final surface quality.Your parts are cleaned after treatment; however, the surface may contain some trace silicon (black particles) as a byproduct of the treatment process. Residual silicon can be removed by rinsing with a solvent or by sonication in water.
Cleaning Coated Surfaces
When cleaning a coated part, rinse with a high purity solvent that will dissolve surface contaminants.
- Use a nonpolar solvent, like pentane or hexane, to remove hydrocarbon contaminants; or use a more polar solvent, like acetone, to remove more active contaminants.
- Avoid using cleaners containing abrasives. Abrasives can scratch the coating surface.
- Mild sonication may assist in contaminant removal. Do not sonicate the surface for more than 1 minute.
- Solids can be removed with a soft nylon bristle brush, using light pressure.
- Do not use basic solutions or soaps with a pH greater than 8.0.
- Do not steam clean SilcoTek coated surfaces; this can damage the layer.
- For high purity applications, SilcoTek recommends the cleaned surface be tested to confirm trace cleaning solvents are completely removed and surface activity is not compromised.
Colors associated with layer thickness are:
Surface Preparation (prior to shipment)
Your parts go through a proprietary aqueous surface preparation by SilcoTek® prior to processing. Additional preparation 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 weather 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. Before sending parts to SilcoTek, contact your SilcoTek representative at silcod@SilcoTek.com or call us at (814) 353-1778
Galling can occur when two parts of similar material are connected under compression and the heat generated "cold welds" the parts together. Customers have observed Galling when two Silco'd treated compression fittings or NPT fittings are assembled. For that reason SilcoTek does not recommend coating the nuts or ferrules from compression fittings and recommends that the coating either be removed with Scotch Brite or PTFE tape when two NPT fittings are connected.
If both mating parts must be coated, then SilcoTek recommends using anti Seize compounds made from Silver, Moly or Nickel: For sample cylinder applications refer to the instructions pertaining to the use of Teflon tape on the valve NPT prior to installation
For more information on anti Seize compounds go to: www.grainger.com
For more information on Galling please go to: www.estainlesssteel.com
Under normal use, your treated items should deliver outstanding performance for years to come. However, effective lifetime is dependent on the severity of the environment. Factors that can impede performance are:
- Contamination: Failure to properly clean the surface can allow increased surface activity. If performance changes, thoroughly clean the surface and inspect the layer for damage.
- Erosion: Contact with abrasives can accelerate surface wear.
- Bases: Contact with a base (pH 8 or higher) can accelerate deterioration of the layer (Silco-coatings only).
- Surface finish: Surface finish and color should stay consistent throughout the life of the product.
- Changes in the finish or color may indicate a partial loss of the layer. To prevent further loss, ensure no exposure to bases or abrasives.
For additional information about SilcoTek contact our technical service department at 814-353-1778 or email at Silcod@SilcoTek.com.
SilcoTek's involvement with surface coatings began in 1987 when we developed a treatment that made stainless steel surfaces inert to low-level reactive organic compounds. Since this initial project, SilcoTek's experts have developed a family of surface treatments to address other specific needs and thereby enhance the performance of system components. These treatments are: