Transformer Radiator Corrosion Protection: Information Buyers Need for Selection

Start with exposure, not location alone

A coastal address, for example, does not by itself establish the severity of salt exposure. Likewise, “outdoor use” does not describe condensation, industrial contamination or shelter. Provide any existing environmental assessment or owner-specified classification with the enquiry.

Build an environmental brief for the radiator

The following information helps define the conditions the surface protection must address:

• Location and installation: country, site setting, indoor or outdoor placement, shelter and ventilation.
• Moisture: exposure to rainfall, prolonged humidity, condensation or splashing.
• Salt and pollution: known sources of marine salt, industrial emissions or corrosive substances.
• Temperature and other exposure: project design ambient temperatures, cleaning agents, accumulated dust and other relevant conditions.

Where conditions vary across the site, identify the intended radiator location rather than relying only on a general site description.

Keep classification, durability and appearance separate

C3, C4 and C5 describe corrosion-environment categories under the applicable classification standard; they do not identify a complete coating system. Provide the standard and edition used by the project, along with any required protection or durability objective.

Specify colour independently. A colour reference such as RAL 7035 communicates appearance, not surface preparation, coating composition or inspection requirements. Similarly, a stated coating durability target should not be treated as a warranty period unless the contract expressly defines it that way.

Share the coating specification and acceptance basis

If an owner or design consultant has issued a coating specification, include the complete document and its applicable revision. Check whether it addresses:

• Substrate and permitted surface preparation methods.
• Required coating layers and their specified dry-film thicknesses.
• Colour, appearance and local repair requirements.
• Inspection items, acceptance criteria and required records.
• Any specified third-party witnessing or test documentation.

Two proposals with the same total dry-film thickness are not necessarily equivalent. Compare preparation, coating materials, application conditions and acceptance criteria as well. If no system has been specified, share the exposure conditions and protection objectives first, then discuss an appropriate configuration.

Review the drawing alongside the protection requirements

Radiator geometry can affect access to areas between panels, edges, joints and connection details. Send the relevant drawings so that any restricted areas and surfaces requiring protection can be reviewed against the proposed process. Sealing faces and other functional surfaces should be identified and handled according to the applicable drawings and agreed requirements.

Plan for handling and future touch-up

Protection requirements do not end at dispatch. Identify the intended transport method, expected storage environment and site handling arrangements, especially where outdoor storage or repeated loading is anticipated.

If site touch-up may be needed, agree on how coating damage will be inspected, repaired and documented, including the materials and procedures to be used. Avoid assuming that an unapproved repair method will meet the project specification.

TengQi Technology (TQT) offers the PC3000-32/520 radiator for ultra-high-voltage transformers. Its suitability and surface-protection configuration should be confirmed against the transformer design, installation environment and project documents. Do not assume a particular material, coating system or treatment thickness without product-specific confirmation.

Prepare your enquiry

Send TQT the project location and exposure conditions, radiator drawings, applicable coating specification and revision, and inspection requirements. Include transport, storage and repair expectations where relevant.

If some requirements are not yet defined, identify the open points when contacting TengQi Technology. The team can discuss radiator selection and the information needed to evaluate the requested protection.