HMS Samarang (1822)
|Ordered:||5 June 1819|
|Laid down:||March 1821|
|Launched:||1 January 1822|
|Completed:||By 7 June 1824|
|Reclassified:||Guard ship in May 1847|
|Fate:||Sold in November 1883|
|Class and type:||28-gun Atholl-class sixth rate|
|Tons burthen:||499 91⁄94 bm (as designed)|
|Beam:||31 ft 6 in (9.60 m)|
|Sail plan:||Full-rigged ship|
She served in various stations around the world until seeing action in the First Opium War, and was then employed, under Edward Belcher, in surveying the coast of Borneo from 1843-1846, after which she became a guardship at Gibraltar before being sold for breaking in 1883.
The first application of cathodic protection was to HMS Samarang in 1824. Sacrificial anodes made from iron attached to the copper sheath of the hull below the waterline dramatically reduced the corrosion rate of the copper. However, a side effect of the cathodic protection was to increase marine growth. Copper, when corroding, releases copper ions which have an anti-fouling effect. Since excess marine growth affected the performance of the ship, the Royal Navy decided that it was better to allow the copper to corrode and have the benefit of reduced marine growth, so cathodic protection was not used further.