JP Duminy's maiden ODI century paved the way for South Africa to claim a record 212-run win over Zimbabwe and sweep their two-game series at Centurion.

It was the Proteas' biggest winning margin in terms of runs against their cross-border rivals and was never in doubt after Duminy hit an unbeaten 111 to lead a dominant batting display.

Jacques Kallis (81) and Graeme Smith (53) had laid the foundations with a century opening stand as the hosts posted an imposing 331 for five batting first.

Zimbabwe never threatened that total as they meekly succumbed to be bowled out for just 119 in 34.3 overs.

The tourists' chase was immediately on the skids as they lost both openers for ducks.

Hamilton Masakadza was first to go when he edged Charl Langeveldt to Kallis at second slip and the veteran all-rounder completed an acrobatic catch, this time off Lonwabo Tsotsobe, soon after to remove Brendan Taylor.

Albie Morkel then ripped through the middle order claiming three wickets for just 12 runs to leave the tourists 62 for five and effectively out of the game.

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Tatenda Taibu was the only batsman to trouble the home bowling, following his unbeaten century in the first match of the series, and this time he stood firm as others fell around him to post 52.

The wicketkeeper-batsman's resolute innings was ended when he became the fifth batsman to be caught behind the wicket, edging Langeveldt to Boucher.

Off-spinner Roelof van der Merwe completed the rout when he had Kyle Jarvis caught by Ryan McLaren and joined Morkel and Langeveldt with three wickets apiece.

Smith and Kallis set-up the Proteas impressive total with a 108-run stand for the opening wicket, although it should have been far less after the skipper was dropped by Taylor at gully when he had managed just four.

The pair made Zimbabwe pay as they brought up a century stand in 95 balls and it took a sharp piece of wicketkeeping from Taibu to end their fluent progress.

Smith was the man to go after he dragged his foot out of the crease momentarily after missing a sweep off Prosper Utseya and Taibu had the bails off in a flash.

Kallis threw away the chance of a century after he had serenely progressed to 81. The all-rounder walked down the wicket but his attempt to lift Utseya over the fence resulted only in a simple catch for Chigumbura at short third man.

Duminy reached a run-a-ball half-century by crunching a short-pitched delivery from Alexander Cremer through cover before Alviro Petersen (13) became one of Ray Price's three wickets when he was unluckily trapped lbw by a delivery that hardly bounced.

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That left the Proteas 240 for four with 10 overs remaining and while big-hitter Morkel could only add 14 before being caught on the deep square leg boundary off Price, Duminy and Mark Boucher took the score past 300 with a unbeaten 58-run stand from 33 balls.

Duminy reached his maiden ODI century, from just 82 balls, in the penultimate over - thanks the a couple of overthrows - with the left-hander's innings including nine fours and a pair of sixes.