Efficient Maintenance of Data Center Precision Circuit Boards Using LOCTITE SF 7655 Cleaner

In today's highly digitalized environment, the stable operation of data center servers is paramount. The maintenance team at a large-scale data center discovered during routine inspections that due to static electricity and minor airborne contaminant deposition in the server rooms, oxidation and slight contamination had occurred on the critical connector contacts of internal circuit boards and precision switch contacts. This could lead to unstable signal transmission, increased contact resistance, and even occasional failures. Traditional cleaning methods were inefficient and carried risks of cleaner residue damaging delicate electronic components or incompatibility with modern engineering plastic housings. The team urgently needed a professional electrical contact cleaner that was efficient, safe, and broadly compatible.

After technical evaluation, the maintenance team selected LOCTITE SF 7655 Electrical Contact Cleaner. This product, developed by Henkel, is a solvent-based cleaner with a unique blend of petroleum distillates and alcohols, specifically designed for sensitive electronic and electrical equipment.

In practice, technicians strictly followed the product instructions:

1. Preparation: After ensuring the equipment was completely powered down, the SF 7655 aerosol can was shaken well.
2. Precision Cleaning: The nozzle was held approximately 15-20 cm from the surface to be cleaned (such as PCB edge connectors, relay contacts, inside circuit breakers) and sprayed liberally. The extension tube was used for targeted application in hard-to-reach areas.
3. Evaporation: After spraying, the cleaner quickly penetrated and dissolved light oils, dust, and fingerprints on the contact surfaces, followed by rapid natural evaporation in the air. The entire process required no wiping or rinsing, eliminating risks of secondary contamination and residue.

• Effective Cleaning: SF 7655 effectively removed dust, light oils, and fingerprints, restoring contaminated contacts to cleanliness and significantly improving electrical contact performance.
• Broad Compatibility: According to the material compatibility tests in its Technical Data Sheet (TDS), the product showed no visible effect (rated 0) on a wide range of common plastics and elastomers used in electronic equipment, such as ABS, PP, PE, PET, PMMA, PC (Makrolon), PBT, and Epoxy resin, causing no swelling or degradation, thereby effectively protecting valuable equipment housings and internal insulating parts. (Note: It is not compatible with Butyl rubber, rated 2).
• Fast Evaporation, Minimized Downtime: Its low surface tension (typical 17.1 mN/m) and fast-evaporating properties greatly reduced the waiting time after cleaning, allowing servers to be restored to service more quickly, minimizing system downtime.
• Safe Electrical Properties: The product exhibits high dielectric breakdown strength (typical 12.4 kV) and leaves no conductive residue after complete evaporation, preventing harmful build-up on equipment and ensuring electrical safety for subsequent operation.
• Cost-Effective: As a cost-effective alternative, SF 7655 enables one product to handle various cleaning scenarios (from circuit boards to switches), simplifying inventory management and reducing overall maintenance costs.

By adopting LOCTITE SF 7655, the data center successfully addressed the challenge of maintaining precision electrical contacts. Its excellent cleaning efficacy, broad material compatibility, and ease of use make it an ideal choice for ensuring the reliability of critical electrical connections, preventing potential failures, and extending equipment service life. This case underscores the importance of selecting the right maintenance product for professional applications.