Abstract
As a result of corrosion in strong mineral acids, tantalum takes up high amounts of hydrogen which leads to embrittlement by hydride formation and to mechanical failure. Electrochemical measurements and immersion tests in hot concentrated sulphuric acid show that ion implantation of platinum considerably reduces embrittlement. This is attributed to the strong catalytic activity of platinum which reduces hydrogen adsorption on tantalum and decreases corrosion reactions including hydrogen evolution.
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