TechNotes

Q. Our parts, made of 99.5% alumina, have carbon deposits that show up after our brazing process. We do not use a flux for our ceramic parts; we high-temp fire a moly/manganese painted paste onto the ceramic. The part is then sent out for nickel plating to prevent corrosion of the moly manganese metallization areas. The next step is our brazing.

We are not seeing any spots on the parts before brazing, but as we continue through 5 brazing cycles and braze in a hydrogen/Nitrogen furnace with the cusil braze rings, we see black spots forming that show up as high-carbon deposits with the SEM data…

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Q. Specifications indicate that “Solujet is inhibited for Aluminum. Corrosion testing is advisable.” What does this mean?

A. Solujet contains sodium metasilicate which acts as a corrosion inhibitor to stop alkaline attack on aluminum. Solujet would not cause alkaline attack on aluminum as long as the bath is not overused and the metasilicate depleted. Learn more.

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Learn how to clean plastics & chromated aluminum parts in a dishwasher using Alcojet. Includes special instructions for heat sensitive plastics.

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Find out how to clean aluminum plates using a high volume in-line conveyorized spray washer using Citrajet detergent.

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Learn how to clean hood filters on your fryer using non-caustic Alconox detergent. Read step-by-step instructions and watch video.

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Find out which detergents are aluminum safe cleaners to clean aluminum from oils and proteins.

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