Overcoating of Inorganic Zinc Primers for Underwater Service PDF Download
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Category :
Languages : en
Pages : 37
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The shipbuilding industry has directed much effort toward ways of limiting escalating coating costs. A major portion of coating costs may be attributed to surface preparation. During construction, steel plate is normally protected with an inorganic zinc pre-construction primer. For the underwater portion of the hull, this primer is usually removed by abrasive blasting prior to final coating of the hull. If the requirement for removing the pre-construction primer could be eliminated, there would be a significant cost savings. As a result, Avondale Shipyards acting on behalf of the Maritime Administration under the National Shipbuilding Research Program authorized the Ocean City Research Corporation to undertake a laboratory study investigating the performance of selected marine coatings when applied over inorganic zinc primers in underwater service. In general, the results of the study suggest that there are inorganic zinc pre-construction primers that can be overcoated for underwater service. The results encourage further tests to investigate the parameters affecting compatibility.
Author:
Publisher:
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Category :
Languages : en
Pages : 37
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Book Description
The shipbuilding industry has directed much effort toward ways of limiting escalating coating costs. A major portion of coating costs may be attributed to surface preparation. During construction, steel plate is normally protected with an inorganic zinc pre-construction primer. For the underwater portion of the hull, this primer is usually removed by abrasive blasting prior to final coating of the hull. If the requirement for removing the pre-construction primer could be eliminated, there would be a significant cost savings. As a result, Avondale Shipyards acting on behalf of the Maritime Administration under the National Shipbuilding Research Program authorized the Ocean City Research Corporation to undertake a laboratory study investigating the performance of selected marine coatings when applied over inorganic zinc primers in underwater service. In general, the results of the study suggest that there are inorganic zinc pre-construction primers that can be overcoated for underwater service. The results encourage further tests to investigate the parameters affecting compatibility.
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Category : Corrosion and anti-corrosives
Languages : en
Pages : 48
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Author:
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Category :
Languages : en
Pages : 19
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During ship construction, steel hull plate is normally protected with an inorganic zinc pre-construction primer. For the underwater portion of the hull, conventional practice is to remove the primer by abrasive blasting before final coating of the hull. If the requirement for removing the preconstruct ion primer could be eliminated, there would be a significant cost savings. As a result, a laboratory study was undertaken to investigate the performance of selected marine coatings when applied over inorganic zinc primers in underwater service. In general, the results of the study suggest that there are inorganic zinc preconstruct ion primers that can be overcoated for underwater service. The results encourage further tests to investigate the parameters affecting compatibility.
Author: National Steel and Shipbuilding Company
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Category :
Languages : en
Pages :
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Category : Swine
Languages : en
Pages : 34
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Author: J. Peter Ault
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Category : Bridges, Iron and steel
Languages : en
Pages : 72
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This report presents the results of a test program designed to investigate, in the laboratory, possible causes for failure of water-based inorganic zinc (WBIOZ) coatings. Failures observed in the field have consisted of either topcoat delamination or the appearance of "freckle rusting" in the cured WBIOZ primer. There are many hypotheses regarding the cause of these failures, but no sufficient explanation exists. Furthermore, there are no proven means to ensure that failures do not occur. The general consensus of the literature is that the failures relate to improper cure of the WBIOZ primer. This improper curing is further hypothesized to relate to environmental conditions. The project initially focused on identifying what relationship, if any, existed between environmental conditions and the observed failure modes. Since a definitive relationship did not exist, further testing was conducted to investigate the effects of substrate salt contamination, improper zinc content in the mixed coating, and the effects of rinsing the primer before topcoating. This report presents the more practical results of the study
![NSRP 1985 Ship Production Symposium. Volume II. [Proceedings.]. PDF](https://books.google.com/books/content/images/frontcover/2vZPAQAAMAAJ?fife=w80-h100)
Author:
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Category :
Languages : en
Pages : 536
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Author:
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ISBN:
Category : Marine engineering
Languages : en
Pages : 630
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Author:
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Category : Protective coatings
Languages : en
Pages : 656
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Author: Daniel H. Gelfer
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Category : Marine engineering
Languages : en
Pages : 24
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