CASE HISTORY SPOTLIGHT #146: Off-Season Boiler/Deaerator Protection

When a new boiler and deaerator were installed at a midwestern college, the chief engineer wanted to guard against corrosion problems of the past that typically occurred when the boiler was idle and drained for annual inspection and maintenance. To prevent this problem going forward, Boiler Lizards were added to strategic points in boiler and deaerator internals. Corrosion coupons were placed and the systems were closed. Months later at startup, no internal corrosion was found upon inspection. This was impressive given the pooling of water from a leaking steam valve. The boilers were filled with deaerated water, drained, and refilled before bringing them back on line. Iron levels were 20 times lower than past startups, and the customer was extremely satisfied with the results.

Log in to read the full case history at:

Keywords: seasonal boiler layup, Case History Spotlight, college boiler maintenance, boiler inspection, boiler corrosion, deaerator corrosion, Boiler Lizard, iron levels at startup, boiler inspection, Cortec

For a PDF version please click here.

Case History Spotlight #616: Refrigerator Coil Dip Tank

December 29, 2023

Due to the strong solvent smell, hazards, and inadequate corrosion protection of the solvent-based paint they were using, a refrigerator coil manufacturer decided to switch to VpCI®-386. They kept this water-based paint in their dip tank, circulating the product to keep it mixed and covering the tank when not dipping the coils. As a result, the manufacturer was able to reduce their VOCs while also achieving superior corrosion protection.

Refrigerator Coil Dip Tank protected with VpCI®-386

Log in to read the full case history at:

Keywords: Cortec, Case History Spotlight, refrigerator coils, dip tank maintenance, replacing solvent-based paint, water-based coatings for metal, water-based corrosion inhibitor coatings, corrosion protection, how to improve worker environments, reduce VOC

For a PDF version please click here.