OptiShield - Frequently Asked Questions

Questions and answers about preventing corrosion in cooling systems

What is OptiShield?

OptiShield corrosion inhibitor is a "water based" liquid additive specially formulated to protect "closed circuit" process heating & cooling systems from galvanic corrosion…………. corrosion which results from the presence of dissimilar metals within the re-circulating system. The OptiShield products are "water based", have excellent heat transfer characteristics and are normally classified as "non-hazardous". OptiShield inhibitors are specifically formulated to control corrosion in systems circulating fluid to industrial machines such as lasers, welders, machine tools and a variety of other process equipment. Read further to learn more about the benefits of using OptiShield.

Return to FAQ Top

Why Do You Need OptiShield?

Closed circuit heating & cooling systems often contain various dissimilar materials such as copper, brass, aluminum, tin, ferrous metals, lead, brass, and other yellow metals. When dissimilar metals are present within a untreated system galvanic corrosion normally results due to differences in electro-chemical potential of the materials. Left untreated…….. galvanic corrosion often leads to pump/seal failures, reduction in heat transfer efficiency, reduced flow, lost revenue associated downtime, and expensive system repairs. OptiShield inhibitors are very effective at controlling galvanic corrosion in re-circulating systems. Improved system life, less maintenance, fewer costly repairs, and less downtime are just a few of the benefits OptiShield provides.

Return to FAQ Top

How Much OptiShield Should You Order?

Of moderate toxicity, OptiShield would normally be used in concentrations of 1 part OptiShield in 10 parts system fluid. For special applications the amount is normally based on a number of factors such as your system's fluid capacity, temperature, system design, and the approximate surface area of the metals present. Our engineers can recommend an appropriate concentration of corrosion inhibitor for your system. Contact Opti Temp for more information!

Return to FAQ Top

Will electrical conductivity of the fluid have a negative impact on the proper operation of the system?

Some processes specify a high resistivity (or low conductivity) fluid. One should review manufacturer specifications with regard to electrical conductivity of their system coolant to ensure that the OptiShield and water mixture falls within conductivity specifications. Opti Temp provides a graph of the electrical conductivity of OptiShield in microsiemens/cm vs. % concentration of OptiShield in DI water for reference.

Return to FAQ Top

Will the solution be damaged by high levels of ultra violet light exposure?

Certain wavelengths of light can be absorbed by OptiShield. Sufficient exposure to ultra violet light may cause OptiShield to break down. OptiShield is not recommended for example in "flash lamp" laser applications where the coolant can be exposed to high concentrations of "broad spectrum" or "ultra violet" light. A relative absorption curve is available from Opti Temp.

Return to FAQ Top

Are there any OptiShield products that I should avoid when considering various metals in my fluid circuit?

Some processes specify a high resistivity (or low conductivity) fluid. One should review manufacturer specifications with regard to electrical conductivity of their system coolant to ensure that the OptiShield and water mixture falls within conductivity specifications. OptiShield II is formulated for low conductivity applications. Caution - DO NOT USE OptiShield II Plus if aluminum is in your fluid circuit!

Return to FAQ Top

What is the temperature range of the solution?

OptiShield is intended to be used in closed loop (re-circulating) systems with atmospheric reservoirs which fall in the temperature range of 40 F to 190 F. Performance outside this range may be satisfactory but is not guaranteed. Note: OptiShield is not an anti-freeze and does not provide freeze protection. However OptiShield is compatible with un-inhibited Ethylene & Propylene glycols. When an OptiShield and water solution will be subject to freezing substitution of the proper % of water in the solution with glycol will normally provide satisfactory results. Contact Opti Temp or the glycol manufacturer for percentage recommendations.

Return to FAQ Top

Can other additives be combined with OptiShield in the system?

OptiShield should not be mixed with any other additives. Loss of protection or system damage may result. Opti Temp can not be liable for damage resulting from the use of OptiShield which is inconsistent with OPTI TEMP recommendations. Note: OptiShield is compatible with un-inhibited ethylene & propylene glycols.

Return to FAQ Top

What will happen if there is a voltage potential present across the coolant circuit?

If a voltage potential exists across the coolant or if electrical grounding exists, do not use OptiShield.

Return to FAQ Top

Will OptiShield void the manufacturer warranty?

Many OEM’s recommend OptiShield for use with their systems. However, if there are warranty concerns, the OEM and/or Opti Temp should be contacted prior to using OptiShield in the system to ensure that the terms of the warranty are not violated.

Return to FAQ Top

What is the shelf life of OptiShield?

Shelf life (mixed or concentrate)-fluid can be stored for a period 15 months from package date when stored in accordance with Opti Temp’s storage guidelines.

Return to FAQ Top

How long does OptiShield last once added to the system?

OptiShield will normally provide adequate protection for a period of one year. The length of time that OPTSHIELD protects can be influenced by many factors. Protection length may vary. It is recommended that OptiShield be changed out a minimum of once annually to ensure continuous protection.

Return to FAQ Top

How critical is the mixture ratio of OptiShield to water?

A 10% concentration level with annual change out is normally recommended. Any mixture less than 7% will compromise protection.

Return to FAQ Top

What kind of safety procedures and equipment is needed when mixing OptiShield with water?

Use in well-ventilated area. Do not breathe mist or vapor. Wash hands thoroughly after handling product. Protect eyes with safety goggles or glasses with side shields. SEE MSDS for more information.

Return to FAQ Top

What size containers are available?

OptiShield is available in 1 pint, 1 gallon, 5 gallon, 15 gallon, 30 gallon, and 55 gallon quantities. Freight is F.O.B. Traverse City, MI for 15 gallons or less, and F.O.B. Covington, KY for orders of more than 15 gallons.

Return to FAQ Top

Can we acquire premixed containers of OptiShield with water from Opti Temp?

Premixed containers of OptiShield may be obtained by contacting the Opti Temp sales department.

Return to FAQ Top

What is the best way to dispose of used OptiShield and water mixture after draining a chiller?

It is the end users responsibility to dispose of and handle in accordance with all current local, state, and federal regulations. At this time OptiShield is categorized as non hazardous with respect to Land Disposal Restrictions (LDR). As long as the solution has not become contaminated by outside processes, it may be disposed of as either domestic sewage, per EPA publication 40 CFR part 261.4 or industrial wastewater discharges per section 402 of the Clean Water Act, as amended.

Return to FAQ Top

Is OptiShield a hazardous material?

OptiShield solution is non-flammable, non-reactive and contains no metal particles, thus it is not listed as a hazardous waste on the Environmental Protection Agency (EPA) list of hazardous materials.

Return to FAQ Top

Are there shipping restrictions on OptiShield?

OptiShield is not a regulated chemical for shipping by the Department of Transportation (DOT).

Return to FAQ Top

What kind of safety procedures and equipment is needed when pouring the mixture of OptiShield with water into the chiller reservoir?

Use in well-ventilated area. Do not breathe mist or vapor. Wash hands thoroughly after handling product. Protect eyes with safety goggles or glasses with side shields

Return to FAQ Top

Can premixed containers of OptiShield with water be obtained from Opti Temp?

Contact Opti Temp sales department for more information at 231-946-2931.

Return to FAQ Top