Dissolvable compositions that include an integral source of electrolytes

A method comprising:

• providing a core particle comprising a first material;
• applying one or more coatings onto the core particle, wherein the one or more coatings comprise at least a second material, forming a coated core particle;
• and
• mixing a third material comprising electrolytic material with the coated core particle or coating the third material onto the coated core particle, forming a dissolvable composition;
• wherein the core particle and at least one coating thereon are electrochemically different such that the core particle and the at least one coating react in the presence of water and electrolytes, and wherein the third material is reactive with water to form an electrolyte.

A method comprising:

• contacting an article with water, wherein the article comprises a dissolvable composition, the dissolvable composition comprising a first material;
• a second material;
• and a third material;
• wherein, upon or after contact with water, the third material reacts with the water to form electrolytes, and wherein upon or after formation of the electrolytes the first material and the second material react in a galvanic reaction.