The Effect of Coating Propellers: the Impact on the Integrity of Nickel Aluminum Bronze as a Function of Cathodic Protection

PDF

Authors
  1. Huber, T.
  2. Noren. B.
  3. Drover, V.
  4. Smiley, H.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
To investigate coatings-based methods for propeller biofouling mitigation, specimens of nickel aluminum bronze (NAB) were prepared by coating with either marine epoxy or copper ablative antifouling, and scored on each side, to expode the NAB. The specimens were immersed for 18 months in low flowing seawater, under either full or no cathodic protection. The specimens were assessed at 3, 6, 12 and 18 months; the assessment included the removal of a small cross section for microscopic examination. The integrity of the NAB at the crevices, due to the score lines, was monitored as a function of time. The coating condition was also mointored; the onset of copper conversion was noted by the 3 month mark with the protected antifouling coated specimens, and continued to increase with time. Furthermore, the electrodeposition of copper onto exposed NAB was also noted with protected antifouling specimens.

Il y a un résumé en français ici.

Keywords
selective phase corrosion;nickel aluminium bronze;antifouling coating;epoxy coating;copper conversion
Report Number
DRDC-RDDC-2018-R154 — Scientific Report
Date of publication
01 Aug 2018
Number of Pages
32
DSTKIM No
CA046921
CANDIS No
807361
Format(s):
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: