Archive for March 16th, 2009

Acknowledgements

Posted on 16. Mar, 2009 by .

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Acknowledgments Many people contributed to this module.  The technical team members include: National Shipbuilding Research Program SP-3 Panel, Todd Pacific Shipyard, Detyens Shipyard, Atlantic Marine Florida LLC, Carolina Equipment and Supply Co. (CESCO), UHP Projects, and NLB Corporation. My apologies if I missed someone. There are many other factors of inspection of the substrate when [...]

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Pressure Sensitive Tape Test for Quantity

Posted on 16. Mar, 2009 by .

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Pressure Sensitive Tape Test- for Quantity The Pressure Sensitive Tape Test described by Hempel is a modification of ISO 8502-3 (Pressure Sensitive Tape test for dust) and is not mentioned in VIS-4.  The tape test can be used as a permanent record.  If lint deposition is a concern, the project specification may require use of [...]

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Summary of Major Points

Summary of Major Points

Posted on 16. Mar, 2009 by .

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Summary of Major Points: 1.    Flash Rust is the rust that occurs from the time the waterjetting process starts to the time the water used for the waterjetting process dries. 2.    Control the quantity of Flash Rust by Project Planning           • During Removal Process           • As Water is drying           • Keep the drying time to a minimum. 3. [...]

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Example of Pressure Wash on Moderate Flash Rust

Posted on 16. Mar, 2009 by .

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Example of Pressure Wash on MFR: Below: the substrate is dry- but it is  darker (overall) than the original substrate. This surface is dry within 5 minutes. The standard pictures in VIS-4 do not provide these types of illustrations of pressure-washed surfaces. The upper half is not washed; the lower half has been pressure washed. [...]

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Pressure Washing and Excess Flash Rust

Posted on 16. Mar, 2009 by .

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What Happens if there is too much Flash Rust prior to painting?  Prior to the application of paint, the substrate must meet the procurement specifications.  Typical field remediation includes:  Pressure washing  Broom brushing  Blowing off with pressurized air  Solvent cloth or dry cloth wiping  Vacuum Upon polling contractors, it appears that pressure washing is the [...]

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