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Any imput on the Waterman Exclusive?


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21 replies to this topic

#21 Old Salt

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Posted 17 November 2017 - 21:06

Something I didn’t know. From Wikipedia:
Brass is susceptible to stress corrosion cracking,[26] especially from ammonia or substances containing or releasing ammonia. The problem is sometimes known as season cracking after it was first discovered in brass cartridges used for rifle ammunition during the 1920s in the British Indian Army. The problem was caused by high residual stresses from cold forming of the cases during manufacture, together with chemical attack from traces of ammonia in the atmosphere. The cartridges were stored in stables and the ammonia concentration rose during the hot summer months, thus initiating brittle cracks. The problem was resolved by annealing the cases, and storing the cartridges elsewhere.

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#22 Tweel

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Posted 19 November 2017 - 23:46

Yes, and there are a couple of us around here who have some concern that habitual use of ammonia for flushing could lead to eventual stress corrosion cracking of gold (alloy) nibs.

fpn_1375035941__postcard_swap.png * * * "Don't neglect to write me several times from different places when you may."
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