Electrodeposition coating composition and electrodeposition coating method

An electrodeposition coating composition comprising:

• 0.001 to 1 part by mass of a zinc compound (A-1) based on 100 parts by mass of the composition;
• an aminated resin (B);
• and
• a curing agent (C),
• wherein
• a milligram equivalent (MEQ (A)) of an acid per 100 g of the resin solid content in the composition is 27 or more;
• a coulombic efficiency of the composition is 30 mg/C or less;
• a film resistance of a 15-μm-thick uncured electrodeposition coating film formed using the composition is 400 kΩ·cm2 or more;
• a coating film viscosity of an electrodeposition coating film obtained from the composition is 3000 Pa·s or less at 50° C.;
• the composition comprises an emulsion obtained by neutralizing a resin emulsion containing the aminated resin (B) and the curing agent (C) with the acid, wherein the acid is one or more selected from the group consisting of methanesulfonic acid, and dimethylolpropionic acid;
• the composition does not contain sulfamic acid;
• and
• a throwing power evaluated by a four-sheet box method is more than 50%.