The Coating That Cracked 36 Bolts: What a Gulf of Mexico LMRP Separation Teaches About Fastener Finishes
On December 18, 2012, all 36 H4 connector bolts on a Gulf of Mexico lower marine riser package failed by hydrogen-induced stress corrosion cracking. BSEE’s QC-FIT report traced a major cause to zinc electroplating done to an outdated ASTM standard without the required post-bake. Here’s what that coating choice still teaches about matching fasteners to the environment.
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