求翻译：经过宏观检查、化学成分分析、金相分析、腐蚀产物分析、腐蚀介质的影响分析，认为电化学腐蚀和湿硫化氢应力腐蚀是叶轮失效根本原因，并提出了应对措施。是什么意思？

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After the inspection, chemical composition of macroeconomic analysis, metallography analysis, corrosion products, corrosive media impact analysis that the electrochemical corrosion and wet hydrogen sulfide stress corrosion is the root cause of the failure of the impeller and put forward a counter me

After the macroscopic inspection, the chemical composition analysis, the metallography analysis, the corrosion product analysis, the corrosive medium influence analysis, thought the electrochemistry corrosion and the wet hydrogen sulfide stress corrosion are the impeller expire the basic reason, and

By macroscopic examination, chemical analysis, metallographic analysis, analysis of the corrosion products, corrosive impact analysis, electrochemical corrosion and stress corrosion of wet hydrogen sulfide is considered impeller failure root cause, and puts forward some countermeasures.

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